I've seen several instances of this on the EasyJet site now that I'm looking, although in most cases, it's more like a few Euros here and there, so hardly worth the gamble.

Some things I'm not sure of:

1) Suppose the EasyJet rate includes breakfast. A third party site does not include breakfast, but states that breakfast costs X Euros per person. The third party rate + 2X is less than the EasyJet rate. I'm guessing this would not qualify?

2) The cheaper third party rate is fully cancellable, and EasyJet has particular cancellation terms. The cheaper rate is obviously better, but EasyJet could say it's not the same.

Any ideas?