There are other routes available for £10 return...
Ok, so it's not unusual for Ryanair to have cheap flights available, but what drew me to this one was that it is:
Available from a major airport
Available on Saturdays (makes finding matching accom easier)
Has good flight times (15:10 out - 13:30 coming back)
You have to jump through the usual hoops of paying with Electron and only carrying hand luggage, but having recently used Ryanair, it's worth it to get such a cheap flight.