Cheers for the fast response Patrick. I knocked so many bees out of the feeder and since there was comb there I figured it would be typical for me if the queen was up there. I had a look but nothing.
Took the feeder apart and got rid of the comb and dead bees. Moved feeder to the colony with the new queen and now all overdue Apitraz strips are out.
Nigel, thanks for the pliers advice - they took some force to remove - with a clang noise as they were separated from whatever structure was connecting the strips to the mesh floor!
I filled the ashforth feeder about half full (as that's all I have) with thymol syrup with a little red food colouring. Heard it done before so I'm curious if I'll see red combs in spring. The colour and the thymol should be more than enough to tell me it's not honey