Mac OS Big Sur doesn't download from software update
Hi, I have a 2020 M1 MacBook Pro and it won't download Big Sur updates from the systems preferences software updater. Each update I have done since I had the MacBook Pro has had to be done through the App Store. I have done this for the 11.1 updates and I had to do it for 11.2 last week and now the same thing is happening with 11.2.1
There is plenty of space on my drive. When I try and download the update it will start the download but then it never completes it. There are no error messages, it just gets stuck. The Internet is fine - I am using another computer. We have fibre, so it is not the speed.
Any thoughts or suggestions will be much appreciated, thanks in advance