Expenses for Business Travel

The issued guidance for benchmark scale rates for subsistence whilst on business travel sets a maximum limit of £25 for a 24 hr period. If a single business trip is longer than 24 hours, for example 3 x full days (72hrs) is the limit £25 for the whole trip, or is it £25 per 24-hr period/per diem = £75 in total? Also, if a company decides not to use the scale rate but instead reimburses actual expenditure on expenses supported by receipts, are there HMRC limits to what value of actual expenses the company can reimburse without having to pay tax, provided they are legitimate business expenses and 'reasonable'. Thank you.

Hi,
It will be £75.
The choice of reimbursing actual receipts is between you and your employer so any limit would need to be discussed with them.
Thank you.