United Kingdom
Getting Vehicle Road Legal
"Convert the vehicle, insure it, get an MOT, inform DVLA of the fuel type and tax class change. Take vehicle for an inspection and wait." **This advice seems to be out of date (see below)**
http://www.batteryvehiclesociety.org.uk/bvsorguk/forums/viewtopic.php?f=5&t=1465
https://www.gov.uk/vehicle-registration/radically-altered-vehicles
Useful link to explain the paperwork process
https://www.gov.uk/change-vehicle-tax-class
Changing Taxation (Vehicle Excise Duty) Class
https://openinverter.org/forum/viewtopic.php?f=9&t=543&p=6670#p6670
https://www.diyelectriccar.com/forums/showthread.php/rx8-conversion-getting-legal-uki-202137.html
** comment on DIY Electric Car 20th April 2020 - "contacted MIRA and have had it confirmed a certifiacte of compliance with R100.01 will cost around £5K i and have been given a provisional form to fill then a phone call which has obviously moved on since i contacted them before - not sure I'm really ready yet but it seem a more formal process is in place." ([1]