Well done, sounds like a canny session, are you sure it was a Plaice and not just a spotted flounder?
Not meaning to be cheeky at all just when I've asked the glassy mafia in the past they all say the same thing you don't get plaice up there it's flounders with orange spots (the odd report are always this time of year too as the flounders start to migrate to spawn and some do tend to get more pronounced orange spots).

Either way, good to see something getting caught! nice one.