Any UK van can be upgraded from Thatcham category 2 immobiliser to Thatcham cat 1 alarm and immobiliser. Upgrading from Thatcham category 2 to Thatcham category 1 can reduce your insurance. The table below lists the insurance approved Thatcham upgrade devices available. Fitting must be carried out by an Thatcham approved engineer for insurance purposes.
| Alarm Manufacturer | Alarm Model | Thatcham Certificate Number |
| GEMINI Security Direct UK Ltd | 031TMH | TSC697 |
| Vodafone Automotive UK Ltd | 4198 | TSC121 |
| Autowatch UK Ltd | 458 RL | TSC113 |
| Vodafone Automotive UK Ltd | 4615 | TSC118 |
| Vodafone Automotive UK Ltd | 4625 | TSC120 |
| Vodafone Automotive UK Ltd | 4698 | TSC119 |
| Vodafone Automotive UK Ltd | 4821 | TSC626 |
| Vestatec Distribution Ltd | 4821 | TSC661 |
| Vodafone Automotive UK Ltd | 4822 | TSC627 |
| Vestatec Distribution Ltd | 4822 | TSC674 |
| Vestatec Distribution Ltd | 4823 | TSC675 |
| Vodafone Automotive UK Ltd | 4823 | TSC628 |
| Autowatch UK Ltd | 695 CAN | TSC114 |
| GEMINI Security Direct UK Ltd | 7590T2-1 | TSC150 |
| GEMINI Security Direct UK Ltd | 931T | TSC151 |
| DIRECTED | Clifford 330X1/2/3 | TSC134 |
| Locks 4 Vans Ltd | CRB1-L4V | TSC415 |
| Scorpion Automotive Ltd | Defender | TSC699 |
| Vestatec Distribution Ltd | EASY CAN EVO M05 | TSC129 |
| Locks 4 Vans Ltd | L4V E-10505 | TSC416 |
| Locks 4 Vans Ltd | L4V E-10510 | TSC417 |
| Locks 4 Vans Ltd | L4V E-10515 | TSC418 |
| Locks 4 Vans Ltd | L4V E-10520 | TSC419 |
| Laserline S.p.A. Limited exclusively in the UK & Southern Ireland | LC801- Can-Lin Bus & Analogue Alarm | TSC369 |
| Laserline S.p.A. Limited exclusively in the UK & Southern Ireland | LC801RF-Can- Lin Bus & Analogue Alarm With Wireless Siren | TSC371 |
| Laserline S.p.A. Limited exclusively in the UK & Southern Ireland | LC801TX-Can- Lin Bus & Analogue Alarm With Remote Control | TSC370 |
| Vestatec Distribution Ltd | Meta System EVO CAN | TSC589 |
| Phantom Ltd | Phantom VanGuard | TSC152 |
| Scorpion Automotive Ltd | Sigma S32 | TSC109 |
| Scorpion Automotive Ltd | Sigma S34 | TSC110 |
| Sigma – Scorpion Automotive Ltd | SIGS36 | TSC366 |
| Sigma – Scorpion Automotive Ltd | SIGS37 | TSC367 |
| Sigma – Scorpion Automotive Ltd | SIGS38 | TSC368 |
| Van Bitz | Strikeback CAN | TSC590 |
| Moving Intelligence Ltd | Vanguard Plus | TSC698 |
