As above, it's the other way round that the rest of Europe is dealing with the Kent variant now, so it's our December/ January wave. It's interesting that the seeds of each wave seem to be about 3 months from the initial case to there being sufficient cases for it to be really noticeable that cases are rising rapidly. January for March/ April, August for October, September for December.
(Suggesting the Wuhan wave started in October??)
Certainly it isn't here at a noticeable stage, so if the start of it is here already we are at least 2 months behind. By May, it looks likely that at least 60% of the population will be vaccinated, and the most vulnerable will have had 2 doses. A wave will struggle very hard in a highly vaccinated population to show as more than a tiny blip unless it gets lucky arriving in less vaccinated areas, even then effects should be localised. By May we should be within sight of the variant vaccines too, even better!
So at the moment I don't see any reason to worry about a large UK third wave just yet @MistressoftheDarkSide. Blips and outbreaks to keep us on our toes, yes - plenty, but not a huge third wave.