Car Insurance - Thatcham Device

[darrsi]

I was attempting to sort out my mum's car insurance last night and was offered a very good price, but then got to the point when it showed the page below saying that a Thatcham Device needed to be fitted before proceeding, which i thought was a bit harsh because it didn't really explain too well what it all entailed.


I'm guessing it's not the Black Box device which is a definite no no, but does anyone know anything about these at all?


Do they charge extra to install or remove, are there limitations like the Black Box, and generally what is it all about?


I've held back on getting any insurance for the moment as it's not due until next month, so any decent info would be appreciated, bearing in mind i don't drive a car so in layman's terms please.