@Rory V 
I'm not sure what browser you're using, but I am using Chrome and while I already downloaded and installed the patch earlier in the week, the link to download that file again is no longer working in Chrome, for me. I opened up Microsoft Edge and was able to download the file using the link provided. It did state that the file was not safe, but if you tell it to 'keep anyway' it will download the zip file no issue.

See if you can simply try a different browser and get it to work.