I have just relaised I haven't payed my road tax for 5 months. I will be getting it taxed this Friday. I wouldn't have received any of reminders etc because I was in process of moving house and totally forgot about setting up redirects etc.

Is it best to tax it and hope they didn't notice? (which I expect they most certainly have)

Or to play the honesty card and contact them and offer to pay the £80 fine plus the missed tax?

I know if you don't pay for 1 month you get the £80 fine, but does that increase month on month after for no SORN or tax?