UK Vecrix MoT test

Entering my 4th year as a (relatively) happy user, it incoming time to take the bike in for its second annual test (the first having been taken last year, and passed without issue). However, my query is this - what is the correct CLASS of test the Vectrix MoT should be? The tester admitted he hadn't a clue and it was the first electric bike he had ever tested. He selected the first class of test at random on his computer at the testing station that was accepted, but I have no confidence that this is correct (as the Class determines the cost of the test). My query to other VX1 owners is this: What were you charged for your test, and what Class was shown on your MoT papers? Thanks!