The review next week will certainly say we'll continue for at least 3 more weeks, to be reviewed early in early/mid May. There may even be a tightening of restrictions if that's feasible- eg no exercising 8am-5pm or more roadblocks. What happens after that will depend on the figures but the 'best' we can hope for, I think, is for some limited relaxation, maybe in certain regions, or regarding things like letting garden centres open. There will be restrictions of some sort for at least 6 months, maybe 12 months, but the large parts of the economy will collapse/disappear completely if the lockdown lasts more than 4 months so there will have to be some relaxation by July, even if Covid is still killing hundreds every day