4. Your obligations
[...]
4.3 You must not post any package under this agreement which contains
any item whose value is more than £2,500 or if the contents are a
prohibited under the scheme.
[...]
5. Liability and Compensation
5.1 In the event of loss of or damage to an item, our total liability
under this agreement will be limited to the maximum amount of
compensation paid for by you having regard to the weight of the item
and the fee paid, or the market value of the item at the time the cause
of action arises, which ever is the lesser sum, unless the posting does
not comply with the provisions of this agreement and the scheme.