Labour leader Sir Keir Starmer is urging the government to publish an exit strategy from the coronavirus lockdown this week.
The government is expected to announce on Thursday that social distancing measures will continue.
Sir Keir said Labour would back such a move but to maintain public trust "there needs to be transparency".
The government said talking about an exit before the virus had reached its peak risks confusing the public.
The Labour leader has written to Dominic Raab, who is deputising for Prime Minister Boris Johnson while he continues his recovery from coronavirus, to say Labour would support a continuation of the measures#####