TomTom Via 135

victim311 Registered Users Posts: 12
Apprentice Traveler
Can anyone help please?
I bought a TomTom Via 135 a few years ago. It came with lifetime maps and I have regularly updated the device through MyDrive.
I purchased a USA map (again, this was several years ago) and installed it on a micro SD card. I have never had any trouble switching from UK to USA until now.
Recently my device refuses to recognise the UK map and I seem to be permanently stuck on the USA map. It's as if the UK map has disappeared from my device.
How can I get this back? Can I get a free download through MyDrive? If so, how do I do this?