GroupCompany
Non-current2018
£m
2017
£m
2018
£m
2017
£m
Deferred grants and contributions617.0570.7
Other creditors25.718.6
642.7589.3
GroupCompany
Current2018
£m
2017
£m
2018
£m
2017
£m
Trade payables27.935.2
Amounts owed to subsidiary undertakings9.08.7
Amounts owed to related parties1.412.1
Other tax and social security5.35.1
Deferred grants and contributions8.88.5
Accruals and other creditors191.7222.62.31.6
Deferred income40.639.5
275.7323.011.310.3

The average credit period taken for trade purchases is 23 days (2017: 23 days).

The carrying amounts of trade and other payables approximate their fair value.

Deferred grants and contributions

Group2018
£m
2017
£m
At the start of the year579.2526.4
Amounts capitalised during the year23.729.0
Transfers of assets from customers34.233.5
Credited to the income statement – revenue(3.3)(3.0)
Credited to the income statement – other operating costs (see note 3)(6.4)(6.7)
Credited to allowance for bad and doubtful receivables(1.6)
At the end of the year625.8579.2