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Removing Risk, Reducing Cost and Adding Value

The LK Group is a multidisciplinary geoenvironmental and engineering consultancy, and specialist contractor. We work nationally from four UK offices and we are all about removing risk, reducing cost and adding value on sites.

We really know our stuff

Think of us as a collection of technical specialists, working hard as a team to solve the problems and challenges that you encounter leading up to planning and beyond. We simplify complex regulation and deliver a holistic service. You will benefit from one point of contact and practical, cost-effective solutions, in one seamless process.

Local authority Regulators listen to us

With decades of technical expertise behind us, including ex-local authority Contaminated Land Officers within our team, we understand the planning system inside out. We use the right language and our ideas are readily approved by the Regulators.

We unlock land and accelerate development

If you want to unlock land, we can help. If you thought your site was undevelopable, think again. Through our desk-based site investigation and risk assessment service, we can quantify or remove the risk from your site, fixing or reducing abnormal costs from the start. Through clever earthworks modelling, we can reduce unnecessary land remediation.

Good quality consultancy will save you time and money

We know that good quality consultancy always pays off in the end. Where you inherit site investigation work carried out by others and the prospect of excessive remediation, we can apply our own expertise and interrogate the reports, to improve the chances of a profitable development.

Our in-house consultancy services will get projects moving forward.

Our geoenvironmental consultancy provides the backbone for our in-house specialist contracting division.

From consultancy to contractor, everything we do is in-house. We can make a real difference to your developments, before they are even out of the ground.

We’ve been developing longstanding, collaborative relationships for over 20 years and we are proud of the diverse client base we have built.

Our clients include:

  • Developers
  • Contractors
  • Architects
  • House Builders
  • Housing Associations
  • Consulting Engineers
  • Local Authorities and Government Organisations
  • International Organisations

We are based across the UK, with offices in Manchester, London, Liverpool and Glasgow.


Conor Leyden
Managing Director

BSc(Hons), MAPM

Conor is a qualified Building Surveyor and Project Manager. He has worked in the project and construction management industry for over 20 years.

Conor was a Project Manager for a large construction consultancy in the UK for 10 years and in 2005 he joined a leading project management company in Sydney, Australia as Associate Director.

Patrick (PJ) Leyden
Co Founder and Chairman


PJ has a wealth of experience in the engineering, construction, and land remediation sectors, with a passion for increasing land value.

Since its inception in 1997, PJ has evolved The LK Group into a respected multi disciplinary engineering and environmental company, helping developers, main contractors and the public sector to maximise their land and property assets. His passion for solving complex and technical challenges has shaped the way we operate and fostered the ‘can do’ attitude of our team.

Colin Crompton


Colin has over 20 years’ experience in the investigation, assessment and management of contaminated land, in both the consultancy and regulatory sectors.

Colin joined The LK Group in 2005. Prior to this, he spent five years as a Senior Environmental Protection Officer with Bury MBC.

Dr. Paul Quimby
Technical Director

PhD, BSc(Hons), MIEnvSc, CSci

Paul is an ex-Contaminated Land Officer for the Greater Manchester Combined Authority and joined The LK Group in 2007, bringing with over 15 years’ experience in the investigation, assessment, and management of contaminated land.

He is passionate about good quality consultancy, undertaking modelling and detailed qualitive risk assessments to de-risk projects. Paul is well-established in academia, lecturing an MSc course at The University of Manchester. 

Ian Deans
Director of Southern Office

Msc, BSc(Hons), MIEnvSc, CSci, CEnv

Ian is a Chartered Geoenvironmental Engineer and Project Manager. He has over 35 years’ experience in the project management of developments in the UK, Middle East, Africa and Euro-Asia.

He is experienced in the ground investigation and remediation of contaminated land, geotechnical engineering and project management of small and large schemes alike.

Dave Anderson


Dave is a qualified Environmental Scientist, with a background in mechanical engineering. He has extensive on-site experience in the regeneration of brownfield land, providing cost effective and sustainable reuse options for a diverse range of clients.

Dave oversees contracts management, health and safety, operations and management systems. Typical developments include residential, commercial, industrial and landscape.

Paul Mallinder


Paul has almost 40 years’ experience in the construction and development sector. Although he is a Chartered Quantity Surveyor by background, Paul diversified away from this many years ago, establishing a range of public-private partnerships.

His core expertise lies in business case development, procurement, and optimising local social impact.

Helen Bennett
Business Development & Marketing Manager


Helen joined The LK Group in 2010 and has over 20 years’ experience as a Business Development and Marketing Manager within the construction industry.

Helen heads up the Group business development and marketing department, leading on strategy and campaigns, forging new relationships, account managing existing clients and overseeing our marketing communications.

Mark Jones
SuDS & Flood Risk Associate


Mark has 40 years’ experience in the construction industry. He is a Chartered Civil Engineer and Chartered Water and Environmental Manager; practised in site supervision, design and build, and managing design teams.

His career has encompassed infrastructure design and construction supervision, including: dams, highways, pipelines, sewers, and sustainable drainage systems (SuDS). Mark joined The LK Group in 2013 and supports our clients with his areas of expertise: SuDS, flood risk, drainage design, expert witness and reviewing third-party reports.

Simon Johnson 
Associate Director of Southern Office


Simon has over 23 years’ experience in the assessment, remediation and management of contaminated land in support of regeneration and infrastructure projects.  He joins us after working at two large consultancies, and a multi-national aerospace company.

Simon has extensive experience of de-risking sites and revising risk assessments to avoid excessive remediation and maximise development potential.

Get in touch today

We are based across the UK, with offices in Manchester, London, Liverpool and Glasgow.
0161 763 7200 (Manchester)
01707 909 059 (London)
0151 235 8716 (Liverpool)
0141 773 6269 (Glasgow)

What our clients say

“Excellent service and, importantly, very pragmatic. One of the best consultancies I work with.”

Andrew Leyssens
Developer Services and Planning – Business Operations, United Utilities