This site has been advertising on TV as a "one stop" for cheap travel.
Just tried them out: a simple booking London Heathrow to Shannon return out on 13 April return 20 April.
Best price it could come up with was £675.
A quick check with the Aer Lingus site £38 for the same trip!!
Ask the same site for Manchester to Paris and it produced a selection of Coventry to Paris flights with TFly.
Always worth shopping around !!