In response to that, here are some statistics from Joel Rodrigues (doubtless based on studying the comprehensive Question Time episode list on Wikipedia):
In 2019, there have been 13 episodes of #bbcqt.
Only ONE episode (the 6th episode - #1393) featured a panel with a majority of Brexiters.
The 13 episodes so far this year have featured 44 Remainers and 21 Brexiters (a bias of over 2:1).
@bbcquestiontime you're fooling nobody.
In 2018, there were 39 episodes of #bbcqt
Only ONE episode (Ep8 - #1356) featured a panel of majority Brexiters.
Episide 20 (#1368) featured no Brexiters at all. 13 episodes featured only one Brexiter on the panel.
In 2018, #bbcqt featured 64 Brexiters and 131 Remainers.
In 2017, there were 39 episodes of #bbcqt
Only episodes 12 and 13 (#1322, #1323) featured more Brexiters than Remainers on the panel. Episodes 15 and 19 (#1325, #1329) featured no confirmed Brexiters at all.
In 2017, 67 Brexiters and 128 Remainers featured on the panel.
Of course, it all rather depends on who you classify as Brexiters and Remainers.