Just received a number of Gladiator movement cards.

Three of them, L7615, L7616 and L7622 have the following entries;

ME for 33 Sqn (8399) IR for 150 Sqn (8925).

I know L7922 was lost in action with 33 Sqn on 31/10/40.

The 150 Sqn entry is confusing as 150 Sqn was a bomber unit in the UK at this time.

Any idea why these three entries would have IR for 150 Sqn? I know IR stands for Immdeiate Reserve. Or does this 150 Sqn refer to another unit such as a salavge and repair unit?