Chr1s, Had a good point o check spark plugs.
it may also be the HT Leads, (cables to the sparkplugs)
They carry a very high voltage (like a stun gun) and sometimes the power can leak through the rubber on the wire if i has been damaged (you cant normally tell visually).
My last car started o suffer problem with flooding.
THE AA man taught me t take te fuel pump fuse out, and replace it whilst cranking the engine, and it always started first time if i did that fiddle.
Although this may be a good time for a Service, considering you dont know when the cambelt was last done or if its due. Missing a Cambelt replacement Can mean TOTAL engine Failure, which is beyond economical repair. & then you may end up selling the car for scraps.
Point to note : sometimes Careful previous owners have their cambelts serviced early, this means that the 2nd Cambelt service has to be don early.