Keith,that may work,although these chub are confident,early on,but it's worth a go,thanks.
Philip,I do leave the rod,until it's wrapped round,or bouncing madly indicating a hooked fish,it's a strange situation,trying to stop catching fair sized fish,some of these chub are 6lbs(though most are 2-4),I really appreciate any suggestions,as any one of them could unlock the problem,as I say maggot is a real possibility,which I may give a go in the next week or so,the problem then is possibly minnows,not that I'll catch them,but they strip the hook,even with ten grubs,if they are in the mood.....one thing after another lol.