Sadly, Your outcome is likely to be what I've listed below,
Summons
up to 56 Day Driving ban
up to 6 points
Fine up to £1000
You friend might get off a litter easier easier with
up to a 28 Day Driving ban if summons
3 points of 6 points if summons
fine of £100 or up to £1000 if receiving a summons. (likely)
However the court are able to use their discretion with these things so hopefully you'll get off lightly.
Wales is terrible for Speed Cameras and if you're not familiar with the area do what I do and drive like your nan, It's not worth a penalty
I hope you get off alright on it, This website is quite informative for information on speeding bans, potential penalties etc
Avoid Driving Ban FAQ | Avoid Driving Disqualification, Avoid Speeding Ban
Best of luck.