17. Trade and other receivables

Current	2008 £m	2007 £m
Trade receivables	306.6	245.9
Other receivables	37.2	29.5
Gross amounts due from customers on construction contracts	17.8	11.1
Prepayments and accrued income	222.0	169.9
	583.6	456.4

Non-current	2008 £m	2007 £m
Other receivables	1.8	1.5
Prepayments and accrued income	6.3	9.6
	8.1	11.1

Trade receivables are non-interest bearing and are generally on 30 days’ terms.

At 31 December 2008, trade receivables at a nominal value of £7.1m (2007: £4.2m) were impaired and fully provided for.

Movements in the provision for impairment of trade receivables were as follows:

As at 31 December, the analysis of trade receivables that were past due but not impaired is as follows:

	Total £m	Neither past due nor impaired £m	0 – 3 months £m	4 – 6 months £m	7 – 12 months £m	More than 12 months £m
	Total £m	Neither past due nor impaired £m	Past due but not impaired
2008	306.6	245.6	52.6	8.4	–	–
2007	245.9	197.4	42.7	5.8	–	–

The Group monitors the level of trade receivables on a monthly basis, continually assessing the risk of default by any counterparty.