Will have a look into this. Looks to be an interesting idea, especially as I have a lot of cars and therefore so many reminders from different sources related to tax & MOT
Thanks for posting
EDIT
Still raining so spent more time on the internet...
Opened an account. Just needed passport number, DL number, a few years of address history and V5C details for each vehicle. Fairly basic service for now, but is a quick way to get tax reminders by email and see things like the VIN numbers online. Also loaded some SORN cars, so handy to have them listed.
Looks like they are to add more functionality to it so can only get better