Mercury continues to rise in Chuadanga, crossing 41 degrees Celsius for the first time this season in early summer
A VVIP flight of Biman Bangladesh Airlines took off from Hazrat Shahjalal International Airport with him and his entourage at 10:30am on Sunday.
Several Cabinet members and military and civilian officials saw him off at the airport.
Abdul Hamid is scheduled to undergo treatment at the Moorfields Eye Hospital and Bupa Cromwell Hospital in London, said Press Secretary to the President Md Joynal Abedin.
He said the president is expected to return on Sep 4.
Hamid, 73, has been suffering from glaucoma for a long time. He used to visit Singapore regularly for his eye treatment, while he was the Speaker of Parliament.