Another surge in infections is to be expected when we start to come out of lockdown. It's not just me saying that (through using no more than a bit of common sense), it's also exactly what Chris Whitty told the Commons Science and Technology Select Committee earlier this month:
https://www.bbc.co.uk/news/av/uk-56333192
What really matters though is the size (and duration) of that 'surge'. A temporary slight rise in infection figures probably shouldn't be of any great concern but the risk is that, if people get too complacent about things like maintaining social distancing, we could quickly get back to where we were at the height of the pandemic.
A Government adviser said earlier today that summer holidays abroad should be regarded as 'unlikely' this year
https://www.bbc.co.uk/news/uk-56467813
So it's clearly far too early for people to start thinking that the crisis is nearly over.