The powerful merger, designated GW231123, produced an extremely large black hole about 225 times the mass of our Sun.

Gravitational waves spotted by LIGO reveal two black holes, 140 and 100 times the mass of the sun, merged to become a 225 solar mass behemoth.

The individuals were held on suspicion of supporting a proscribed organisation under at the protest in the vicinity of Central Square on Saturday.

Much of the UK is in for a reprieve from the hot weather as the third heatwave this summer starts to come to an end. Amber and yellow heat health alerts which have been in place across England – ...