Currently, there is comfortable 25°C in Prague with a similar forecast (even higher temperatures) from August which makes it a great chance to explore the city during these sunny days,
Most of the flights are currently ranging from £32 – £41. Book quickly as these fares are most likely to be sold-out soon.
These prices are highly unusual for high season and are most likely caused by covid-19 pandemic where airlines try to get passengers back on board.
From 10/07 there are no restrictions on travel to Czech Republic or on the return to the UK.