It looks like Kilner has a few types of jars. If you go with them, you’ll want the ones with the 2 part lid, a flat metal disk, and a separate metal band, because that’s what I’ll be demonstrating. They show the same basic steps for jam making that I’ll be going over, on their site with both the 2 part lids, as well as directions for using their their clip lids. I know the kilner clip lids are popular with some home canners here in the US, usually folks who have extra fancy blogs. Since I’m not a fancy blogger, and the 2 piece Ball lids are ubiquitous here, available everywhere, I just use those.
Here’s their basic jam making instructions with their 2 part lids and their clip lids.
https://www.kilnerjar.co.uk/making-your-first-preserve
I’ll have to do some more research about jar sizes for you. All the standard Ball jars here come in 1 quart, 1 pint (16 oz), half-pint (8 oz), and quarter-pint (4 oz) size. I’m not sure if those are exact equivelant to their sizes, or if they are off between Metric & Imperial.