Your a long way North up there - for the older sassenacks - this is just along the coast from where Local Hero was filmed
If you are only looking at stage 1 level of tune I wouldn't bother with custom remap, an off the shelf package with a few tweaks should be fine, it should make a big difference to drivability over standard.
I'm down in Edinburgh, I have not got my mk5 remapped yet, but thinking APR or Revo stage 2 - leaning more Revo as I had a previous Mk4 on Revo, plus their DSG remaps are considerably cheaper than APR.
There is no doubt that R-tech knows their way around a Mk5, they get a lot of positive reviews and they know how to market themselves - but if you dig deep here in the forum there are a few negatives floating around - several say their rolling road is a bit too generous. Someone recently posted they are booked up till autumn, so it could be a long wait to get a slot.