OK I tried taking it outside until all satellite signal bars were green and again searching for "Swansea"
the result was the same = "Location not found"

I then connected it to Garmin express and it said there was one update
it was very quick = less than 1 minute - then completed successfully
I then took it outside again and waited till it had a satellite fix - and again tried "Swansea"
the result was still "Location not found"

interestingly it could find a place called "Swanscombe" or something similar that came up as an autocomplete option while I was entering "Swansea"
So it seems it has some kind of map - but it is likely corrupted as many places are missing

is there any way of getting at and deleting just the map files - and if I did so - would it just get new ones via Garmin express
if not - what are the next steps?
thanks again!!