Although I'm only 40 minutes from Manchester I don't know any to recommend. My LBS is in Blackburn and that's a long journey if you're hoping to build a relationship with a shop.
A thought for you? Have you considered a Dolan. I've had two in my cycling life and both were excellent bikes, I really enjoyed them. I have several friends and my son who ride Dolans and are very satisfied.
Dolan sales are mainly online but they do have a shop in Burscough you can visit. I haven't been but know to people who have and both praised the service and attention to their needs that they received.
The shop is in Burscough and there's an excellent cafe on the other side of the road called Merlin - nothing to do with the online cycling website. I appreciate it's a bit of a trek from Manchester but could be very worthwhile.
https://www.dolan-bikes.com/