Brits face a heat surge this week as parts of the UK will be hotter than holiday hotspots across Europe. Met Office forecasters predict highs of 17C coming on Wednesday. The mercury could then rise to 18C on Thursday - which has the potential to be the hottest day of the year so far. Met Office weather maps show London could hit 17C at 3pm on Wednesday. The mercury will rise to 15C or 16C quite widely across England , with 11C coming in Northern Ireland and 12C in Scotland . For Thursday, they