Neither RYR or EZY/EZS have ANY hubs that's not in their business model.
You can't book through tickets.
If you choose to book two flights through a base and are for any reason delayed both carriers WILL strand you and recharge you at last minute (Full fare close to Legacies Y rates).
The business model is POINT TO POINT and they do this rather well - Better than most legacies ever did in the case of the UK beyond London.
The only UK variable fares carrier (Oft referred to as LCC) with any Hubbing and connection opportunities is FLYBE -they have two hubs Manchester and Southampton and do offer through fares - They even sell codeshare on Air France mainline out of Manchester and Birmingham and carry Etihad passengers from/to Manchester from other regional airports.
FlyBe even codeshare with none other than British Airways on the Manchester -Dusseldorf, Hanover and Milan services !
Apologies, what I mean to say was "base" not "hub"