The ONS have just published the figures for March. The total number of deaths was below the 5 year average. Deaths certified as COVID-19 were 7% of total.
https://www.ons.gov.uk/peoplepopulationandcommunity/birthsdeathsandmarriages/deaths/bulletins/deathsinvolvingcovid19englandandwales/deathsoccurringinmarch2020#covid-19-and-the-overall-mortality-rate-for-march