|Falling due within one year:|
|Less: provision for impairment of receivables||(0.4)||(0.2)|
|Trade receivables — net||15.5||16.3|
|Prepayments and accrued income||32.4||30.9|
During the period the Group charged the provision with £0.1m (2014: £0.3m) for the impairment of trade receivables and utilised £nil (2014: £0.6m).
The following table shows the age of financial assets that are past due and for which no provision for bad or doubtful debts has been raised:
|Neither past due nor impaired||14.3||16.7|
|Past due by 1–30 days||2.1||1.5|
|Past due by 31–90 days||1.4||0.8|
|Past due by 91–180 days||0.6||1.4|
|Past due by more than 180 days||—||0.2|
The Group does not have any individually significant customers and so no significant concentration of credit risk.
Based on historic default rates and extensive analysis of the underlying customers' credit ratings, the Group believes that no impairment allowance is necessary in respect of trade receivables not past due or past due by up to 30 days.
The directors consider that the carrying amount of trade and other receivables approximates their fair value. Financial assets in the scope of IAS 39 include all trade receivables and £2.9m (2014: £4.3m) of other receivables.