A big change coming - how prolonged or temporary it will be is still open to question but really from Tuesday next week it will be very warm and later hot (and increasingly humid) with easterly winds shifting more continental southeasterly.
With low pressure the driving force to our southwest and steering up this hot air on it's eastern flank there is likely to be some instability around that will spark some storms. I think storms not only home grown but later originating in the Bay of Biscay (an altogether different beast storm wise) could cause problems.
Temperatures from Tuesday generally mid - high twenties inland and possibly 30 + in some places later depending on how things evolve. Always that little bit cooler on coasts and particularly east/southeast coasts through the latter half of next week.
At this point warnings may be issued for high temperature and potential flooding.
Please keep up to date with the forecasts.