The lockdown regulations were to prevent our health and social care systems being swamped by the seriously ill. By Easter the vulnerable groups should all have been vaccinated, so even if most of the population still haven't, this shouldn't matter. The small proportion of the young and healthy who do get seriously ill can be treated by the NHS which will now have the capacity to manage them.
Other countries may well wish to insist on prior vaccination, and I can imagine that travel insurance companies may also require it.