TomTom One - Which UK maps

[Bikerz]

Hi all

Updated my Start following the guides on here fine, trying to do my partners Tom Tom One now with no sucess

ttgo.bif:
DeviceName=TomTom ONE
DeviceVersionHW=ONE (v6)
DeviceSerialNumber=Y2xxxxxxxxxx
BootLoaderVersion=55274
ApplicationVersionVersionNumber=7166
ApplicationVersion=8497

Which Maps should I put on it?
Im trying United_Kingdom_and_Republic_of_Ireland_945_6174 which it will not recognise as usable. I have used Fast Activate with no luck. I used these maps as they worked on my Start

Cheers

Sheldon