Dont take any notice AF-just remember what you learned on Human Performance & Limitations! Some on here dont quite understand the connection with asking for help and instruction!
First of all your routing looks questionable. Are you sure you mean Hilton Park Services, from Uttox to Wrexham you are closer to Stafford or Keele services?
Have a look at
Map of Services on the M6 - Motorway Services Online
Would I teach the use of any motorway services as a waypoint-no. The reason being most look the same but I would use it as a cross check for another waypoint. I would route Uttox -Stone- Wrexham