Postage went up a while ago and basically added loads onto the standard test kit making it an average whopping £2.70 when it was under £2.00 before! I didn’t put my prices up and absorbed it, despite the fact that I make very little on many of the tests especially the gut ones.
So, unless I think you need something quickly, I will use second class for most things from now on, which brings the average down to £2.20 and I still won’t pass the extra costs on to you. In reality, parcels are normally there within 2 days anyway with second class.
I have to say I don’t resent paying for our postage service. I deal with several countries’ postal services and they cost far more, so I am very grateful for ours!