Now fellers, this is one of those situations where I do believe the original Campaign author (BBW) is having a little fun with y'all... lol - Look in the scripted layer, and you will see a small group that leaves Liverpool, and takes the long-way-round to Southend-On-Sea for the Thames estuary and probably London. This particular group is a grouping of merchant vessels (hence the 8 knots). However, since an Isle Trawler is listed as "Leader", it does show as a Task Force. That is the vagaries of the game. Merchant as Leader, makes it a convoy, even it it is 12 King Georg V BB and a half-dozen Illustrious CV, it will still be a convoy. So a warship as Leader, and you have a Task Force...
Now, as to you fellows passing by and NOT sinking perfectly valid targets, contrary to BdU instructions, and you can expect to be relieved of command upon RTB. Maybe even the possibility of being sent to the Eastern Front, when it opens...