Thanks to Babs Trevitt who sent me the following which she spotted on Twitter. I no longer use that platform, so hadn't seen it.
Obviously these are the requirements for The People's Friend submissions. If you have guidelines from a different publication with different instructions, then you should follow those for that particular publication. Otherwise, I don't think you'll be going wrong by adopting the above for all submissions.
Btw, I don't use Word to write. Before submitting I 'save as' a Word document and that works fine, so don't worry you'll need to buy Word if you don't already have it.
If anyone is concerned / confused about submission guidelines (for any publication) then contact the editor concerned - but feel free to mention it here. If there are queries about a publication where I have a contact, I'll attempt to get an answer.
To any magazine editors who may happen to see this - I'm always happy to post any guidelines / tips / requests / super exciting gossip you may wish the share! Same thing goes for organisers of free to enter writing competitions.