The problem that German wWngs have in the UK is that they are virtually unknown by consumers and they have no critical mass. Easy jet on the other hand certainly have critical mass in the UK and they will soon have it in Gemany, because of their developments in Berlin Dortmund and to Cologne. They also serve MUC.
Thr DBA example should be a salutary lesson to anyone LCC wantiing to serve the UK on a small scale. Thery opersted LGW-TXL for a few months and had to abandon it.
It looks like a one horse race to me. Easy jet's costs are lower than German Wings and their marketing is far more effective.
Any bets?