Join Date: Jul 2005
Location: London, ARN, HEL, ..... or MAN
Programs: BA GGL / GFL, Mucci Diamond!, HH Diamond, Radisson VIP, FB Gold, LH Sen, Hertz Gold
Posts: 6,481
So, as a data point, I came through T5 at 5.30 this morning - the first weekday of half term.
I used South Fast Track for my experiment as I expect that will be what the OP will use. There was a queue of 6 people waiting to get to the scanners and I would say I was through security in less than 5 minutes.
So really no issue this week when coming through the terminal so early.