This is good news! It was probably also the case on Tuesday, but I wasn't aware and checked my hand luggage in to avoid the (non-existent) issue.

https://www.heathrow.com/at-the-airp...ge-and-liquids

"Liquids in containers up to 2 litres can remain in cabin bags and be taken through security in Terminals 2, 3 and 5."

It doesn't mention flight connections.