There are several ways, but I would suggest that you join a local bee club. You may find that someone there has a microscope and the expertise to help you make a diagnosis. It would be more likely that if you see a wing problem, it is deformed wing virus (DWV) secondary to Varroa infestation. That is very common. K-wing is much less common.
The most simple treatment for tracheal mites involves making cakes of icing sugar with Trex (hydrogenated vegetable fat), but there are other options too. I don’t know if you can still buy the evil fat in Trex in the UK any more, as we left over 20 years ago.
There is some evidence that oxalic acid vapour (used for Varroa) also has some effect on tracheal mites, so it would be better to use that if you know that your colony has Varroa at significant levels. Any thoughts, @Dee?