Heron Apartment is a ground floor flat in Berwick upon Tweed. The location is good. You're not right in the busy centre, but you can walk there in a couple of minutes.
It sleeps four, with two bedrooms and one bathroom. It has a 4 Star rating. It's modern, clean and well equipped.
The flat is on the ground floor and has a wheelchair accessible entrance. There's parking on site. You can get to the front door easily.
Everything you need is included. Bedding, towels, washing machine, dishwasher, WiFi. There's a local pub nearby.
Berwick itself is full of history with its walls and bridges. The Northumberland coast is right there. The beaches are incredible, like Bamburgh and Holy Island. They're about a twenty minute drive away. The Northumberland Coast site has good information.
The Scottish Borders are just over the bridge, maybe fifteen minutes. You can be in Edinburgh in just over an hour if the traffic is good.
Useful links for planning: English Heritage for Berwick Barracks and Northumberland National Park.