A married man (born 3 November 1934) died on 8 July 2017 . He received a retirement pension of £12,7 30 between 6 April 2017 and the date of his death. His wife (born 12 August 1940) had no income whilst her husband was alive but received a pension of £18,685 between 8 July 2017 and 5 April 2018. They were married in 1970 and made no elections in relation to the married couple's allowance.

Calculate their income tax liabilities in 2017-18.