https://www.slab.org.uk/guidance/aa-accounts-test-applied-for-whether-outlays-charged-are-allowable/
You are entitled to be reimbursed for outlays actually, necessarily and reasonably incurred by you.
You cannot under any circumstances ask the client to put you in funds. However, you are entitled to apply to us for interim reimbursement of outlays during the advice and assistance in certain circumstances.