The inventories of maintenance materials consist of raw materials and other materials for the production and maintenance of finished and semi-finished products for the maintenance centres.
17. Trade and other receivables
Trade and other receivables includes an amount of €210 million (2019: €3 million) relating to ProRail and the Dutch central government.
18. Cash and cash equivalents
The cash and bank balances are at the free disposal of the company, with the exception of €129 million (31 December 2019: €134 million).
19. Accrued and deferred items
Accruals and deferred income as at 31 December 2020 amounted to €14 million (31 December 2019: €32 million).
20. Trade and other liabilities
Trade and other payables includes an amount of €88 million (2019: €6 million) related to ProRail and the Dutch central government, of which €86 million relates to the NOW scheme.