"I think we will/should be in lockdown until there is a vaccine unfortunately."
That's not possible, because of the economy and the need to pay the bills,
regardless of how well / badly MH fares
It is sensible to announce plans for the next 3 weeks, whether lockdown or relaxation,
but it would be completely unnecessary to commit - in advance - to lockdown beyond about mid May
The government are hopefully using the lockdown time to organise the infrastructure for mass testing, contact tracing and isolation of the infected
A phone App for the UK are likely to be only a useful supplement to this, even if the App works properly and is avaailable early enough to be of use
The UK should watch what happens in European countries who are starting to relax lockdown now
... and despite the desperation of the "Indefinite Lockdown" lobby to grab at any news to deny that relaxation can work,
countries like Germany, France, Austria have NOT so far seen an increase in cases over the last few days
- it's too early anyway to see consequences of relaxation; it is next week that would show if indeed an upward trend has started