Does the OP have a better offer on the table?
Brexit looms and there is rumblings of European if not of world wide resecession again and we all know what that brings to the industry, which could be kicked off by a hard Brexit when the EU looses the UK cash cow. I would get in now, ensuring I purchased redundancy and loss of licence/critical illness insurance to cover any debts I had.
Good aircraft, swept wing jet, an ideal stepping stone to say Jet2 who are sucking up 250 this year alone if you believe PPJN, or BA or the Middle East etc etc.
Never turn that first job offer down unless you get a better offer before you start.