Police said the body of a man has been found in a pond in Epping Forest, Essex.
Boris Johnson warns of being "hostages to fortune" amid signs reopening of international travel could be pushed back.
Boris Johnson said she would be “sorely missed” and described her as a “great servant”.
A 34-year-old man is to appear in court.
The former PM lobbied on behalf of the collapsed finance company Greensill Capital.
The lateral flow tests will be available from Friday.
Thousands of people marched in towns and cities across the UK.
Officials stressed travel would not begin before May 17 at the earliest and that it was still too soon to predict which countries would be cleared.
Boris Johnson will set out details of the ‘Covid status certification’ scheme amid concerns over ‘vaccine passports’.
Ministers believe the scheme could enable the safe return of crowds to sporting events, festivals and theatres.