SunnyBunny,
I just took a look on fly dot com for the dates you mention, BHX & MAN are priced similarly between GBP650 and GBP700, from LGW Air Transat direct for GBP438.
Hi Yes I am sure there are deals around. I was looking at the airlines web site for prices and wondered at the anomalies.
If and when I travel then I will research all avenues looking at price, convenience ( I don't want multiple flights if I can) and finally if I can use my avios points to arrange an upgrade.
I am leaning towards Air Transat from Manchester upgrading to equivalent of business which looks like being the same price as cattle class on others.
Once again thanks for your replies.