Take unwiseowls advice seriously. Recent advert in our local paper for bricklayers offering 360 quid per thousand bricks laid. Most decent brickies can do a thousand bricks a day so work it out for yourself.
Back to topic, there is a website giving average salaries for pilots at the various UK airlines. Have a troll through PPRuNe and you will find it. However, as many ppruners will acknowledge, you will spend a long time flying at night on a very low salary before you even get a sniff at the big boys pay packets.