19. Bank overdrafts, bonds and bank loans

Amounts falling due within one year:


	2018 £m		2017 £m
Bank overdrafts		442.0		393.2
Corporate bonds and bank loans		583.1		230.9
		1,025.1		624.1

The Group considers that the carrying amount of bank overdrafts approximates their fair value.

Amounts falling due after more than one year:

2018

£m

2017
£m

Corporate bonds and bank loans

5,634.8

6,250.4

The Group estimates that the fair value of corporate bonds is £5,965.7 million at 31 December 2018 (2017: £5,816.5 million). The fair values of the corporate bonds are based on quoted market prices.

The Group considers that the carrying amount of bank loans of £186.8 million (2017: £993.4 million) approximates their fair value.

The corporate bonds, bank loans and overdrafts included within liabilities fall due for repayment as follows:


	2018 £m		2017 £m
Within one year		1,025.1		624.1
Between one and two years		423.8		727.6
Between two and three years		761.0		421.0
Between three and four years		609.8		1,384.2
Between four and five years		670.1		356.6
Over five years		3,170.1		3,361.0
		6,659.9		6,874.5