Tim Hunt

I am self employed as a courier and a bouncer/guard. For the purpose of self assessment, my understanding is i will need to physically put this down as two separate jobs, keep two sets of accounts etc. Some of my expenses apply to both jobs, for example i buy some safety equipment to use on both jobs, i use my laptop for both jobs, i use my mobile for both jobs etc. Is it considered appropriate simply to split these expenses 50/50?