Pale Rider
Legendary Member
Duncan, if you need help in picking your new bike give me a shout. Maybe @ScotiaLass will come too.
For riding the Union Canal you need something comfy, preferably easy to clean ... yes, bikes must be cleaned too especially if you decide to ride further towards Edinburgh, where the surface is horrendous.
You'll soon get bored of the same routes, your bike should be a bit adaptable.
A bike in the home is like having a pet you wouldn't leave a pet out all night, would you? Get the spare room ready for the new arrival
Wise words and good offer from @Pat "5mph" - there are no bad £500 bikes in Evans, but you won't go far wrong with her riding shotgun.
As regards 'adaptable', I would steer you towards a mountain bike with very semi-knobbly tyres.
The 29er bikes roll well anyway, and a lot have a central ridge on the tyres to make them easy to pedal in a straightish line on a hard surface.
The wider tyres are less likely to puncture because the weight of you and the bike is spread over a larger area.
A mountain bike frame is very versatile, being sturdy and able to take a rack, mudguards and most other accessories.
For range of gears, a mountain triple cannot be beaten.
You will probably get a suspension fork, but a bit of give in the front end is no bad thing.
There is a weight penalty, but you are not looking for outright speed or distance, and as I was once told, no one ever got fit riding a light bike.