On recasting the twitches started again. This time I pointed the rod directly down the line to see if that would induce a more positive take, and rigged up the maggot rod to fish a lobworm under a float. The float hadn't been out long when the bobbin on the leger rod jiggled and rose again. I connected with something that felt pretty much like the fish I'd lost and for a moment or two I thought it was perch. But when it refused to give up doubt set in. The lack of spines on the dorsal that eventually broke surface confirmed those doubts. Another carp had fooled me.
I can see how these fisheries can be appealing. You'd have to work hard to blank, and the small carp fight quite well on light gear. But surely it must get boring after a few sessions? I know I'm heartily sick of catching small carp. The lack of action actually was more enjoyable as the chances of a bite from a perch seemed greater without the constant attentions of carp, and the anticipation level was higher.
Anyway, I can face not catching barbel again now. So that's what I'm going to do next!