At some point we will be back to a westerlies pattern, if not there already. This is a fairly well understood feature of U.K. weather, which normally occurs some time around June.
Indeed the transition from wall-to-wall blue sky a couple of weeks ago to cloudy unsettled days suggests that this has already happened.
That’s not to say we won’t see fine weather over the summer, however it’s quite likely we’ve seen the end of what we saw over April and May.
How that might affect those supermarket queues and beer gardens of course remains to be seen.
In Scotland the weather usually turns in July to become more unsettled. August is usually quite damp