I feed Idjit a raw meat diet with a commercially prepared nutrition supplement. You just have to be very careful about where you prepare it, what utensils you use, and how you prepare the food. Cleanliness is #1. I always clean up with very hot water and detergent, and I use a bleach solution on my counters and sinks. I do not let the meat touch the counters or sink areas, but use clean glass plates for a base for cutting up the meats instead of a cutting board.
You need to be careful also, about where you get your meat and if it is processed or not. No meat with additives, extra sodium and I do not buy pre-ground meat to avoid any bacterial contamination.
I get the meat, keep it refrigerated and then prepare the food right away, I freeze it in ice cube trays, some special glass baby food containers and also use some larger glass containers I have. I make sure the food is frozen for at least 24 hours before I thaw in the fridge and only take out of the freezer what I'm going to use in the next day or two. No more than that.
Idjit loves his food + supplement and is very healthy. We transitioned him very slowly to prevent gastric upsets and he is always eager at mealtime. I alternate proteins and lean/fattier meats and he gets chicken breast and thigh, turkey breast and thigh and beef chuck so far.
You should not feed just plain raw meat for a full diet, it doesn't have all the nutritional components a cat needs, but it is an alternate to canned wet food. A chunk of muscle meat or gizzards & hearts, as well as raw chicken wings and necks are said to help dental health, if the cat goes for it.
There may be some raw food nutritional supplements in the UK. You would have to do further research and see what's available. I use a supplement that uses egg shell instead of bone, because I wanted to get a lower phosphorus content in his food.
Unfortunately, we can get salmonella from our lettuce or other fresh vegetables these days, not only meat products. Plus, there have been reports of recalls of commercially prepared canned and dry pet food that has not been contamination free. We do the absolute best we can, though, right?