@Guffers - Tell me about it, it's the days we have to fly at short notice.
1) I refuse point blank to fly RyanAir, paid £0.01 for one of their flights once. (inc all taxes/charges) - I would never pay more than this!
2) AerLingus was close, until I realised the price I saw was without bags

3) BA were cheapest, for checked bags from Heathrow.
4) Easyjet ect, no good for us, Heathrow is actually very easy, even more so if we stay in Kingston night before

@ Sir Tigger - Thanks. Both myself and MrsT shall be attending both our grandfathers funeral in the same week

- Both of us were very close to our grandparents, so going to be tough.
@Al - The price it showed was 'all in'
It showed the total price of the flights, inc taxes, charges ect. It then said, do you want car hire? It listed a few car options, all cheaper (showing total, all in price) than the total of the flights previously.
Clicked through, each car, from a shitbox Micra to Premium was listed as the same price, so I suspect a site error?
Total amount debited, was less than the total flight cost. It confirms the car hire during the period we are there, all in. No extra charges mentioned. (expect extra insurance collision ect)
Staying around the Dublin area, but no doubt need water proofs anyway!