Subsitence allowances etc.

Hi all, I am looking for clarification on what to pay our employees of a limited company using the tax free allowances. The employees are staying away Monday-Friday (travelling Monday morning and returning home Friday afternoon so 4 nights away). We book their hotels not including any meals. Travel time from site to head office approx. 3 hours. No journeys after 8pm. What is the maximum we can pay tax free via payroll to cover meals and other costs? Anything in addition we will tax as usual. Thank you.

Hi,
Please see guidance here reagarding this:
Business journeys tax relief (490: Chapter 5)
Thank you.