Boeing has received a boost for its grounded 737 Max jet after British Airways-owner IAG signed a letter of intent to order 200 of the planes.

The airline group said it was confident that the Boeing planes would return to service in the coming months.

Boeing is currently trying to develop a software fix for 737 Max planes after two deadly crashes.

All 737 Max planes were grounded in March after an Ethiopian Airlines flight crashed, killing 157 people.

Five months earlier, 189 people were killed when a Boeing 737 Max operated by Lion Air crashed.