You can see it on the forecast charts leaving North Africa at T+96 and at present, it's forecast to affect the UK at the start of July.

It's under my 10-day forecasting radar and these forecast plumes do have a tendency to be shifted eastwards when they get as far north as the UK, nearer the outcome time (i.e. to 'topple'), but if the charts stay the same, we could see temperatures of 30C+ in the south at the start of next month.