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Trade and other receivables | 12 Months Ended
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Dec. 31, 2019
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Trade and other receivables | 18. Trade and other receivables The following are included in trade and other receivables:
Amounts falling due within one year |  | 2019 £m |  |  | 2018 £m |
Trade receivables (net of bad debt provision) |  |  | 7,007.6 |  |  |  | 8,062.2 |
Work in progress |  |  | 349.5 |  |  |  | 366.5 |
VAT and sales taxes recoverable |  |  | 212.7 |  |  |  | 264.2 |
Prepayments |  |  | 287.1 |  |  |  | 287.3 |
Accrued income |  |  | 3,292.7 |  |  |  | 3,541.2 |
Fair value of derivatives |  |  | 1.4 |  |  |  | 1.3 |
Other debtors |  |  | 671.3 |  |  |  | 578.8 |
|  |  | 11,822.3 |  |  |  | 13,101.5 |
The ageing of trade receivables and other financial assets by due date is as follows:
|  | Carrying amount at 31 December 2019 £m |  |  | Not past due £m |  |  | Days past due |
2019 |  | 0-30 days £m |  |  | 31-90 days £m |  |  | 91-180 days £m |  |  | 181 days- 1 year £m |  |  | Greater than 1 year £m |
Trade receivables |  |  | 7,007.6 |  |  |  | 5,553.3 |  |  |  | 934.9 |  |  |  | 341.0 |  |  |  | 92.1 |  |  |  | 22.4 |  |  |  | 63.9 |
Other financial assets |  |  | 582.5 |  |  |  | 357.6 |  |  |  | 129.9 |  |  |  | 48.3 |  |  |  | 16.2 |  |  |  | 5.2 |  |  |  | 25.3 |
|  |  | 7,590.1 |  |  |  | 5,910.9 |  |  |  | 1,064.8 |  |  |  | 389.3 |  |  |  | 108.3 |  |  |  | 27.6 |  |  |  | 89.2 |
|  | Carrying amount at 31 December 2018 £m |  |  | Not past due £m |  |  | Days past due |
2018 |  | 0-30 days £m |  |  | 31-90 days £m |  |  | 91-180 days £m |  |  | 181 days- 1 year £m |  |  | Greater than 1 year £m |
Trade receivables |  |  | 8,062.2 |  |  |  | 5,873.7 |  |  |  | 1,370.7 |  |  |  | 549.1 |  |  |  | 128.3 |  |  |  | 75.6 |  |  |  | 64.8 |
Other financial assets |  |  | 551.7 |  |  |  | 424.9 |  |  |  | 61.3 |  |  |  | 14.2 |  |  |  | 8.6 |  |  |  | 7.7 |  |  |  | 35.0 |
|  |  | 8,613.9 |  |  |  | 6,298.6 |  |  |  | 1,432.0 |  |  |  | 563.3 |  |  |  | 136.9 |  |  |  | 83.3 |  |  |  | 99.8 |
Other financial assets are included in other debtors. Past due amounts are not impaired where collection is considered likely.
Amounts falling due after more than one year |  | 2019 £m |  |  | 2018 £m |
Prepayments |  |  | 2.2 |  |  |  | 3.0 |
Accrued income |  |  | – |  |  |  | 16.5 |
Fair value of derivatives |  |  | – |  |  |  | 8.4 |
Other debtors |  |  | 135.4 |  |  |  | 152.1 |
|  |  | 137.6 |  |  |  | 180.0 |
The Group has applied the practical expedient permitted by IFRS 15 to not disclose the transaction price allocated to performance obligations unsatisfied (or partially unsatisfied) as of the end of the reporting period as contracts typically have an original expected duration of a year or less. Bad debt provisions:
|  | 2019 £m |  |  | 2018 £m |  |  | 2017 £m |
At beginning of year |  |  | 116.6 |  |  |  | 91.3 |  |  |  | 93.8 |
New acquisitions |  |  | 5.0 |  |  |  | 1.5 |  |  |  | 1.2 |
Charged to the income statement |  |  | 45.4 |  |  |  | 66.7 |  |  |  | 27.4 |
Released to the income statement |  |  | (19.0 | ) |  |  | (11.6 | ) |  |  | (8.4 | )
Exchange adjustments |  |  | (4.1 | ) |  |  | 2.1 |  |  |  | (4.1 | )
Transfer to disposal group classified as held for sale |  |  | (8.9 | ) |  |  | – |  |  |  | – |
Utilisations and other movements |  |  | (23.3 | ) |  |  | (33.4 | ) |  |  | (18.6 | )
At end of year |  |  | 111.7 |  |  |  | 116.6 |  |  |  | 91.3 |
The allowance for bad and doubtful debts is equivalent to 1.6% (2018: 1.4%, 2017: 1.1%) of gross trade accounts receivables. Impairment losses on work in progress and accrued income were immaterial for the years presented. The Group considers that the carrying amount of trade and other receivables approximates their fair value.

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- Definition The disclosure of trade and other receivables. [Refer: Trade and other receivables] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_10_e&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Text block [abstract] + References No definition available. + Details
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