Bex88, your last post was spot on.
Money doesn't make you happy. It certainly makes life a lot easier but it doesn't make you happy. I have also seen to many people die to young and who in their live were obsessed with money. They died with lots of cash in the bank to fund all the plans they had for when they retired.
Whilst I don't work for BA I can't comment on them specifically. I work for a charter gone scheduled UK airline whose work is busier in the summer then in the winter. However I still did 800 hours a year with hardly any nights away from home. I am in my mid to late thirties and work 75%, which means a block of 7 days off every 28 days. My other half has the same Part Time block so we are guaranteed to have a week off together each 28 days. It is absolutely brilliant. Yep, money is slightly less but still earning more than enough to have a nice lifestyle. I can highly recommend going Part Time.