The allocation of retail subscription revenue to each element of
a bundled transaction is complex and requires judgement, as described
in the Group’s critical accounting policies on page 86. There is a risk that
inappropriate allocations could lead to non-compliance with accounting
standards and incorrect acceleration or deferral of revenue, principally
for new customers who may enter a contract of one to two years’
duration, which may include hardware or installation at discounted
prices up front.