DONE IT!!!!!
Decided to try an another way of doing it ... it wouldn't let me put my dates in so I chose the latest dates I could for 2013, then went into the year view then forward arrow to choose my dates....
While I was deciding on the cheapest flight for the most suitable date for us the prices went up! Luckily only by approx £2 each each way.
Final details: 19 May 2014, returning on 2 June 2014 ; costing 63.03 each Manchester to Corfu and 56.01 each Corfu to Manchester. Plus baggage and credit card charges total bill £295.48!!
Good luck to everyone else
Janis xx