Can any one suggest a work around for UK Business Mileage..  Below are my Question to Zoho Support with the response. 

I am new to Zoho Expenses and I am trying to set up to Pay Business Mileage n the UK we have 2 mileage rates which are 45p per mile for the first 833 miles a month and then 25p for all miles over 833 miles.

Currently, you can have only one default mileage rate under a Policy. We don't have an option to setup mileage rates according certain criteria (i.e different rate if it is more than 833 miles) in Zoho Expense. Sorry to disappoint you on this front.

Then Different employees have a limit that they can claim. For example £500 per month.

It will not be possible to setup monthly amount limits on Expense Reports in Zoho Expense. Sorry about that.

You can only setup amount limit for an individual expense from Admin Panel > Policies > Policy Settings > Under General Rules > Expense Amount Limit. Hence, when the user tries to record an expense which exceeds the limit, a Policy violation warning will be shown for the user.