For a first time job, grab it. You need to fly a decent type and although a Dash8 is no jumbo jet I am sure its bigger than what you have been flying.
Allowances !! What allowances, as Sparkle says its £1.50 an hour. Absolute rubbish.
Once you get the type and a few decent hours my advice is.. leg it fast from BACX, rubbish employer, its that simple
Good Luck