If you use assistive technology (such as a screen reader) and need a
version of this document in a more accessible format, please email email@example.com.
Please tell us what format you need. It will help us if you say what assistive technology you use.
This letter explains whether authorisation is required under Regulation 13 of the Railways (lnteroperability) Regulations 2011 in relation to the modification of the class 320 fleet. The letter confirms that authorisation for vehicles where renewal or upgrade work is taking place is required. It outlines the technical standards which Eversholt Rail will be required to comply with.