UK to work with Japan on supersonic Tempest fighter jet

First demonstrator aircraft will fly within next five years' to test features such as stealth capability

The UK government has announced that it will work with Japan on plans for its next-generation Tempest fighter jet as executives from across the aviation industry gathered in the sweltering heat for the start of the Farnborough airshow.

The first demonstrator Tempest aircraft - capable of supersonic flight - will fly within the next five years" to test features such as stealth capability.