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LEZ Compliant Solution

Low Emission Zones (LEZ) have been introduced across Aberdeen, Dundee, Edinburgh and Glasgow, to improve air quality and protect public health.

Diesel powered taxis must meet Euro 6 emission standards in order to be compliant. The Scottish Government are helping taxi drivers to meet these LEZ standards through grant funding. 

Our CVRAS approved retrofit solution replaces the diesel fuel system in non-compliant TX4 cabs with a brand new, Euro 6, petrol-LPG engine.

What is included?

Brand new 2.5engine, featuring our latest GEN4 system, adapted to operate full time on LPG or petrol.

Including a brand new exhaust system, catalytic converter, radiator, full tank of LPG and Petrol, testing, wheelchair ramp cover, tyre repair kit, 2year/80k mile warranty, CVRAS & UKLPG registration.

Cost (new GEN4 system): £ tbc

Current grant amount: Up to 80% of retrofit cost, capped at £12k

Note: If you received the disposal grant for a previous cab within the last 12 months, this amount will be deducted from the grant total

Larger petrol tank option

Subject to availability at time of installation, we have manufactured some larger 40ltr petrol tanks, to give additional peace of mind and added range.

This option is now available for all TX4 Euro 4 models & Euro 5 models  


The cost of the larger petrol tank is an additional £400+Vat payable at the start of the retrofit installation (subject to availability).

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Am I Eligible for the grant funding?
  • Available for all TX4 models 

  • Must be a current, wheelchair accessible taxi, frequently operating in city centre areas of Glasgow, Edinburgh, Aberdeen or Dundee.

  • Applicants must own the vehicle outright and therefore have the legal right to retrofit the vehicle.

  • Not currently at Euro 6 standard.

  • Non-VAT registered businesses only (9 employees or less)

Full terms and conditions available on the Energy Saving Trust website (link below)

Applying for the grant

The applications for grant funding are done online via the Energy Saving Trust website. Click on the link below to complete the application (note: you will require a written quotation from VRS).  

Once you have received your grant offer letter you can then proceed with the retrofit


A minimum £2,000 booking deposit (paid to VRS) is required to secure your booking at the installation centre (see below).


The deposit is refundable should you wish to cancel.


The installation centre will contact you to arrange the installation date.

On the agreed date, the vehicle brought to the Installation centre & the remaining balance (less the grant amount) is payable to VRS before the installation can begin.  


When the retrofit has been completed, the cab will be ready for collection.


The installation centre will provide a demonstration on how the system operates and how to refuel.  


​Transport Scotland pay the grant directly to VRS on completion.

The installation centre will prepare the relevant paperwork for you to sign on collection & assist with changing the V5 log book. 

Authorised Installation Centres


55 Muirhead Road



G69 7HA


3 Fishwives' Causeway,



EH15 1DF

The deposit can be paid over the phone or by bank transfer. 
For general questions or further information, please get in touch.

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