"The Gloster Meteor entered service just after the Messerschmitt Me 262. In July 1944 the experimental unit Erprobungskommando 262 (Test Command 262) began to fly experimental interceptions of high flying Allied reconnaissance aircraft. On 25 July one of their Me 262s clashed with a RAF Mosquito, which escaped, allowing its crew to report their first encounter with a German jet. The first operational sortie of the Gloster Meteor came two days later, on 27 July.
The Gloster Meteor can claim to be the first jet fighter to enter operational service, while No.616 squadron of the RAF was the first operational jet fighter in the work. The first fully operational Me 262 squadron, Kommando Nowotny, was not formed until September 1944, under the command of the famous ace Walter Nowotny, flying its first operation on 3 October."
yep.