I only read so far down the thread, and the fool admits he told a lie, white lie or not it makes no difference to an insurer.
On the voiding issue, where I used to live there was a problem with "cruisers" at the local drive-thru. Plod rolled up, handed out 7-day wonders all round, and before the night was out had actually telephoned many insurance companies and "queried that the car was correctly insured as modified".
Net result a lot of people with 8 points & 1500 quid fines, and trying to get insurance with an INS10 on your licence is verging on impossible, especially when asked if you have had cover refused or suspended in the past