About Us

As R&D tax credit experts, we specialise in securing claims that are above the national average.

It’s thanks to a refreshingly different approach which we believe is unique among tax consultancies and it has proven results. 

Our team is led by highly skilled engineers and accountants who all share forensic attention to detail and an eye for the opportunity.

This unique combination means we can quickly identify those projects eligible for tax relief including investments in new products, services, software and processes which free your business up for growth.

Unique formula

Our specialist expertise means we achieve a significant boost to the value of all our claims. Due to our specialist’s tactical approach, our success rate has risen above the national average. Understanding and identifying the qualifying projects is what we do. And most importantly we find the supporting evidence for a successful HMRC claim. 

Knowing where to look means we achieve average claims of about £54k and more. In fact, with our help, our customers have been eligible to reclaim funds from £10k to £600k from their innovation investments. From agriculture to waste management and everything in between. 

Compliance with Confidence

Integrity in business is key and that’s why we are diligent in ensuring only the most robust of processes are followed. There’s the added reassurance of a stringent and fully tested checking process before claims are approved for submission to HMRC. Indemnity is also included for all our clients for additional peace of mind – although it’s never been needed.

Handpicked and high calibre

People are what makes us special. At ZLX you’ll find a handpicked team of experienced and approachable high calibre specialists. Within the skillset is front line R&D and innovation project leadership for global brands, senior-level taxation planning, Chartered Accountants plus an efficient and pro-active support team.

Founder Steve McCallion has over 30 years of experience at the leading edge of engineering innovation and business growth. From directing major projects in the oil and gas industry to heading one of the largest suppliers of robotic systems to the food and drink sector and leading the largest industrial scale company in the world, gives ZLX an unrivalled combination of experience.

National Presence

Our office team in Scotland is backed by a national network of professional partners and a growing UK-wide consultant base. We’re all fully equipped with the latest communications and conferencing technology for speed and ease of communication


I cannot recommend working with Ray, Amy, and ZLX highly enough.

The pandemic was almost career-ending for our agency (and many others) but your guidance and work meant we have managed to navigate our way out of a very tricky position. We’re looking forward to working with you again. Thank you so much for everything.

Founder, CEO

Creative event design, digital and brand experience agency, specialising in fashion, beauty, lifestyle, and entertainment industries.

This is INCREDIBLE, AMAZING. I actually had to speak to Ray to double check the figures earlier as I was reading whilst on various Zoom calls and couldn’t quite believe the numbers!! Ongoing, I’ll be much more prepared in terms of understanding how to pull the right information together for you.

Managing Director

Production & PR company

Understanding the clients needs and scalability. Showing empathy and professionalism. Offering personalized services and valuing relationships. You will find all by partnering with ZLX.
They helped us in end to end planning and finalization of an R&D claim that resulted in maximizing our claim up-to twice as much as we had last year!

Executive Head

Currency Exchange Company

Working with Tim from ZLX was a positive experience for us. He advised, managed and completed our R&D tax claim with the minimum of fuss. This meant we could get on with the important business of managing our organisation, safe in the knowledge that our best interests were being looked after. As a result, we can highly recommend ZLX should other businesses be looking for a partner that brings expertise, efficiency and professionalism in their approach to R&D tax claims

Managing Director

Catalyst Interiors

ZLX completed our R&D Tax Relief claim, the tax saving and cash rebate that have been realised have made a massive difference to our company.

We would have no hesitation in recommending future clients to ZLX. If you are considering making an R&D Tax Relief Claim then please look no further.

Managing Director

EOS Europe

ZLX have been amazing throughout the process from start to finish. From our initial calls through to detailed and comprehensive explanations of the submission criteria, we knew we were in good hands. The ZLX staff have been patient and understanding of our individual business dynamics and secured us a sizable claim. This has allowed us to explore new avenues for our business moving forward and we will absolutely be using ZLX’s services again in the future.

Ashley Michael Boycott, Director

Diabolus Esports

Stephen & Ray, if I’m honest I never thought I’d be writing this email to you both BUT I’m ABSOLUTELY THRILLED that I am! My Finance Manager has just informed me that ZLX have made payment today of our R&D Tax Claim for the year 2018. Of all the years to have met you both and for ZLX to have delivered, as they said they would, on behalf of my Team, I would like to thank you both very much. I look forward to talking about how we approach the 2019 claim.

Managing Director

Event Production Company

We would highly recommend ZLX to anyone interested in applying for R&D tax credits. Their service was friendly, professional, and efficient and they really helped take the headache out of the entire process.

James Anderson

NorthColour Ltd

ZLX promised to work alongside our accountant throughout the process, which they did. The outcome of the whole process was that we received an unexpected amount of money back from the HMRC that I was VERY GRATEFUL FOR. I would recommend any business owner to investigate the opportunity of a tax relief rebate and I would highly recommend that they put it in the hands of ZLX. ZLX were professional and ethical from the start of the process until the end.

Eco-friendly Energy Solutions

Time for a refreshing change?

There’s funding available for business growth and it’s there for the taking. Having the ‘know how’ to navigate R&D tax credits is what it takes. By adding the experience of innovation, we help businesses tap into that potential with an approach that’s as professional as it is refreshing.

Perhaps it’s time to talk to us.

Call us now on 0141 739 3377 or email hello@zlx.co.uk or customerservice@zlx.co.uk

Our Staff

Founder & CEO

steve mccallion ceo

Steve McCallion

Founder & CEO

Senior Management/Board of Directors

david purvis commercial director

David Purvis

Commercial Director

Management Team


Direct Sales Manager

Jack Avery

Partnership Manager

Geoff Hunter

Indirect Sales Manager

James McDonald

Technical Manager

Business Development

Thomas Owen

Business Development Manager

Sarah Purvin

Business Development Manager

Finance/Accounts Team

Gosia Rybak

Finance Support Manager

Kirstie Burden


Gemma Herd

Trainee Accountant

Sam Greenwood

Trainee Accountant

Compliance Team

Amber Hind

Compliance/Legal Officer

Freya Wilkie




Technical Team

Broadie McKenzie

Technical Support Manager

Ellen Niven

Technical Writer

Robbie Kinnaird

Technical Writer

Recruitment Team

Stephen Rafferty

Recruitment Manager

Grace Taylor

Recruitment Specialist

Customer Service

Rachel McTaggart

Customer Services

Isla Rafferty


Sales Team

Joanna Barnes

Internal Sales Representative

Dylan Russell

Internal Sales Executive

Our Consultants

Find our where our consultants are based

Charles McLaughlin

Chiara Zin

Emer Blake

Evan Mcglynn

Scott Louden

Alan Meston

Adetutu Emmanuel

Bill Dickson

Bobby Horne

Calum Fischer-Keogh

Campbell Ure

David Ramsay

Ericsson Spencer Brown

Jamie Hopkin

Kelly Davidson

Mufaro Masarira

Paul Seeley

Robert Jones

Robert Rennie

Ross Archibald

Stephen Anderson

Steve Marlow

Thomas O’Connell

Trevor Geraghty

Clare Wall

David Morris

Lauren Barrett

Nikki Loxton

Scott Newton

Yvonne Currie

Ben Davies

Daniel Jeffery

Gareth Elliot

Haji Miah

Liam Powell

Michael Lee

Mohammed Farhat

Patrick Towers

Paul Duffy

Paul Reid

Robert Kellaway

Terry McIlwaine

Tim Carty

Alice Martin

Andrew Warneken

Carolina Palacios

Ella Moore

Haithan Askar

Harprit Singh

Isaac Vaughan

Jay Bhandal

Karen Oliff

Keith Johnstone

Neil Tracey

Paul Towers

Raghavendra Naik

Sarmad Khan

Shukeel Abbas Chohan

Steve Byrne

Steven Lawson

Catherine Johnson

Chris Burch

Diar Fattah

Lee Scott

Marcus Boswell

Roy Schram

Simon Whittaker

Taban Hussein

Alastair Boyes

Brendan Mccarthy

David Matthew Harris

Elliott Crabtree

Eva Payno del Rio

John McSweeney

Neil Archibald

Simon Taylor

Stephen McLaughlin

Victoria Gibbs

Adrian Terris

Andrew Cowman

Annameka Andrade

Asif Aziz

Bobby Robert

Bora Ozdemir

Cassandra Brown-Iyasara

Chiko Shire

David Egenes

Eddie Ita

Errord Jarrett

Gautam Dutta

Gavin Scott

Giar Fattah

Gustavo Vitolo

Ian Morrison

James Balen

Jeff Cobham

Jim Sykes

John Gregory

Maba Jeng

Madjou Ndiaye

Marcelo De Freitas

Mark Burroughs

Martin Karakolev

Muhammad Shehryar Qadir

Nathan Olukotun

Nick Patullo

Olivia Watters

Paul Griffin

Peter Adams

Peter Courtney-Fitch

Ray Jones

Richard Roy

Toby Green

Toby Woodcock

Tsungai Muzanenhamo

West Larkin

Will Scott

Zak Farah