when i registered my tomcat (was a disco) i had to fill in the form and send a cheque for an SVA they then gave me a date for a VIC as i had the correct no of points but they needed to check to decide. i had already MOTed and insured it due to misinformation turned up points we checked off and the only part of the chassis he showed any interest in was the wheelbase, as this is unchanged no probs so new tax was paid SVA cheque riped up and new log book saying tomcat in post.
so you tell me because i know other people have had differing experances
as for SVA/MOTs you have to get the car SVAed then MOTed but most test stations will do the MOT after they have finished the SVA (they charge you for SVA and MOT at standard rates)
hope this helps if not your welcome to PM me if you want
mike