As much as 20mm to 30mm could fall over a few hours and there may be some frequent hail and lightning strikes (Picture: George Cracknell Wright) Make the most of the Bank Holiday sunshine while you can this weekend because thunderstorms are set to drown it out once again. The Met Office has forecast balmy weather over the extended break, with all parts of the UK seeing dry spells. The best weather is likely to be seen today, with highs of 22C fo…