b'Mercia Asset Management PLC103Annual Report and Accounts 2021A reconciliation from the opening balance to the closing balance of the expected credit loss allowance in respect of trade receivables is set out below:Year endedYear ended31 March 31 March2021 2020000 000As at 1 April 205 184Increase in loss allowance 235 125Amounts recovered (155) (101)Amounts written off(3)as at 31 March 285 205The net increase in the expected credit loss allowance of 80,000 (2020: 21,000) has been recorded against revenue in the consolidated statement of comprehensive income. The maximum exposure to credit risk of the receivables at the balance sheet date is the fair value of each class of receivable disclosed.21. Cash, restricted cash, cash equivalents and short-term liquidity investmentsas at As at Strategic report Governance31 March 31 March2021 2020000 000Cash at bank and in hand 54,491 23,971total cash and cash equivalents 54,491 23,971total short-term liquidity investments 234 6,215total restricted cash 2,484 467Financial statementsThe Group holds 2,484,000 (2020: 467,000) of cash on behalf of third-party EIS investors, which is not available for use by the Group and therefore has been presented as restricted cash.22. Trade and other payablesas at As at31 March 31 March2021 2020000 000Trade payables 326 729Tax and social security 240 244Other payables 3,233 908Accruals and deferred income 4,328 2,9248,127 4,805Other payables includes a liability of 2,484,000 (2020: 467,000) relating to cash held on behalf of third-party EIS investors.'