Darren,
I'm in the same position as you having also lost my job this weekend (same airline as you!), and have been investigating accountants for the 6 months that I've been self employed, as I feel that it is v complicated and to use a professional would pay for itself in terms of credibility and what I could save vs getting investigated.
I've got an accountants name that was recommended to me by a former colleague of ours - I'm going to call them today or tomorrow. If you would like the details or to discuss further please pm me with your number and I'll call you.
Cheers.