Why is it so difficult to get a reliable supply of any brand of hypoallergenic cat food in the UK?

Having waited for stock to come in, as I always have to do, I find it's gone up in price again, by £1.30 per pack since last month.

July: £12.69
August: £13.99

I've given 3 stars because my cat isn't sick with this food like she is with almost everything else, but it's become so frustrating running out all the time, and this leap in price is painful.

I bought these cans back in January as I normally buy the pouch version but it became out of stock then and has been when I've looked since (also price has increased) I bought quite a few packs of these cans because I know how precious it is to my cat having trialled many many diets. My cat won't touch this stuff and when he did initially try it a few times it made him throw up I don't know what could be different from the pouches as they are practically the same packaging. Very disappointed

I have tried so many foods for my cat who has allergic asthma. This hypoallergenic turkey one is the only one that doesn't exacerbate his breathing problems, eye twitching and head shaking. It is a god send. He's also just had perfect blood results and his kidneys look great for his age. Please don't ever stop making it or shipping to UK!!! Thank you

I thought this would be the same as the smaller tins available on zooplus but it is totally different texture. This is very much like Feringa canned or MAC’s. Very meaty grainy texture. Seems really dry to me and for urinary diet needs to have more moisture as my cat doesn’t drink

Have a cat who is pushing 20 years old and who has suffered from keep food down and passing it through other end for quite a while. The switch to these specialist foods have had an amazing impact on his health and his bowel movements. The change was immediate too.