[Neil]

This is LCC allowances I found on their website, it would appear they don't have a limit as such as anything over the allowance can be claimed on production of receipts.

Overnight Accommodation

Where the nature of the duties being undertaken result in a councillor or
co-opted member being absent from his/her usual place of residence,
overnight accommodation will be booked and paid directly by the County
Council.
In exceptional circumstances where it is not possible for the County
Council to make a direct booking on behalf of a councillor or co-opted
member, the actual receipted cost of accommodation, including breakfast,
will be reimbursed to the councillor or co-opted member. Such
reimbursement will be subject to a maximum allowance per night of £129
for London and £113 elsewhere in the UK.

Day Subsistence

A councillor or co-opted member may claim up to the following maximum
amounts when absent for the periods stated below from their normal place
of residence:
(a) a period less than 4 hours - £5.65
(b) a period between 4 and 8 hours - £11.25
(c) a period between 8 and 12 hours - £22.50
(d) a period in excess of 12 hours - £33.75
Actual expenditure in excess of £33.75 may be reimbursed subject to the
production of receipts.