About Us

Secure24 (S24) was launched by its Head of Service David Boswell in 2014, a trading name of Definitive PSA Ltd established in 2006. S24 is dedicated to supporting organisations and families who care for persons with Mental Health conditions or whose behaviour is challenging.

Demand on Mental Health services is fast growing in the UK and we want to do everything we can to support it, therefore we are dedicated to delivering high standards of care through the NHS and private sectors 24 hours a day.


As a result of our continued investment into staff, training, equipment, and specialist ambulances, S24 is recognised nationally for its professional capacity to respond to and manage a range of diverse situations across the UK.

When it comes to the safe management and transport of service users and their associated needs, our commitment at Secure24 is to lead. Our ethos is to ensure everyone and all service users are treated with integrity and empathy at all times. We operate a comprehensive range of services that will help you and your needs, for more detail on these please go to our Secure Services page or contact a member of our operations team who will be please to talk to you.

Meet the Team
Head of Service & Interim Business Development Manager David Boswell

David is a security professional and has worked in a variety of fields to date. His strengths are in operational planning, business development, design and management. David’s hands on approach to the business has seen Secure24 rise to become a respected and industry leading provider.

Operations Manager Martin White

Martin arrived at Secure24 in May 2019, his experiences span specialist fields in both the military and civilian words at strategic level. Martin delivers expert operational planning and management, leadership, training and development that will heavily support service expansion.

Finance and Office Manager Lisa Tassell

Lisa joined the company in April 2019 and quickly established herself within its accounting procedures. Lisa brings a significant level of financial and managerial experiences and with this successes now also oversees our core office functionalities maintaining efficiency and compliance.

HR and Designated Safeguarding Lead Kayleigh Noel D’avila

Kayleigh has been with the brand since its formation and has worked in a variety of roles throughout her time. She now plays an important role in HR specifically covering staff relations, recruitment and admin in support of the operations team.

Payroll and Purchasing Natalie Lincoln

Natalie supports our payroll and purchasing requirements working closely with our suppliers and staff. Natalie joined Secure24 in December 2019 and has a significant amount of experience from her former career as a chartered accountant and brings these qualities to our needs.

Team Leaders

In addition to their role as a Secure Technician, Team Leaders assume a variety of additional responsibilities to ensure crews function proficiently at all times. They will monitor staff and provide guidance where necessary, and are on hand to make informed decisions and liaise with key personnel from other agencies.

Kieran Sabine
Secure Technicians

Secure Technicians (ST’s) are Front-Line trained professionals, operationally ready to respond to a range of dynamic situations across the UK. They are compassionate, friendly and motivated individuals, with a team focus is to ensure their actions are positive and supportive.

David P
David H

Staff Training

Our ongoing investment in staff training has established Secure24 within its industry as the leading provider of secure ambulance services. Our Secure Technicians (ST) undergo a comprehensive training program which is designed to teach, challenge, prepare and develop. Following successful training ST’s are assessed within their role ensuring professional standards are adhered to. Our training program incorporates a wide variety of tutorial and physical exercises teaching both knowledge and skills that are essential to the environments we work in. Below is an overview of our training modules;

Secure Technician Foundation Course parts 1 and 2 not limited to the following;
  • Roles and Responsibilities
  • Operational policy and procedures
  • Introduction to the Mental Health Act, Capacity Act and Codes of Practice
  • Understanding legal powers and legislation
  • Decision making and accountability
Prevention and Management of Violence and Aggression not limited to the following;
  • Risk awareness and legislation
  • Communication skills
  • Conflict management and de-escalation
  • Physical skills
  • Searching
  • Use of force, break away, restrictive measures, paired and multi ST tactics
  • Service user escort and removal
  • Handcuffing
Safeguarding – Advanced to Levels 2 and 3 not limited to the following;
  • Children and Young Persons
  • Adults

Ambulance Driving;

  • Advanced driver training
  • Emergency Blue Light Ambulance driver training
Emergency First Aid not limited to the following;
  • Dealing with an emergency
  • Assessing a casualty
  • Unresponsive casualty breathing/not-breathing, use of AED
  • Seizures
  • Bleeding/injuries/shock

Who We Work For

Secure24 is identified by many organisations as a trusted practitioner within the mental health sector, for professionally handling the transport requirements of those effected by mental health or whose behaviour challenges.

A list of our top 9 accounts are detailed as below;