www.easyjet.com

Connect through BRS, EMA, NCL, or STN depending on layover time.

I believe Easyjet does not transfer luggage even between its own flights (not sure about this), so budget enough time to collect luggage and check-in again at the transfer airport.

By buying early (fares for this summer are not loaded yet), prices should be eminently reasonable. FYI, those tickets are non-refundable.