A mate of mine is very ill with acute appendicitis and has consequently overlooked registering his RG500 as off road (he blew the engine last year while we were out for a ride and it's been in his garage since then awaiting parts). As I'd been to see him today I took the V11 and other info and registered it online for him. However his tax expired at the end of Sept and the DVLA site said that as there was a gap between the expiry date and the SORN date that was automatically set at 01.11.05 they may contact him over the "offence". How likely is this and is the fact he's been incapacitated since the end of September a valid excuse if they do (following his blood test results he was taken back into hospital today, the poor bugger can barely walk)?