Possibly not, I hadn't realised that at the time though

Hi, thanks for your edits. I've just noticed that you're not using the standard format for opening_hours. I'm fixing some now, but try to use the proper format going forwards

source is actually Bing, forgot to change the tag from a previous edit

source is actually Bing, forgot to change the tag from a previous edit

Looks good to me (from a distance).
My only query is on the three paths in Walton Park that you edited, changing them from track to footway, they all have the note "No longer in use", which was added in 2015 when the footway tag was removed. If they are in fact in use, it seems to me that this tag should be removed.

I hadn't realised that about dialling numbers

I can see why you say that, but I felt that this was acceptable. Firstly, it's only changing the tags, not keys.
Secondly, I feel that it is important to have phone numbers callable internationally, particularly with the increasing use of OSM data in smartphone apps. When travelling, I expect to be able to tap on a phone number and for it to work, without me having to enter the country code at that time. This is a straightforward change to make, simply replacing the leading zero with "+44 ", and if there was any uncertainty over a phone number then I didn't change anything but left a note.
Also, I didn't realise there was a problem with mass edits necessarily. I am aware of the automated edits code of conduct, but felt that this didn't come under that banner as the changes are made manually and individually.

I was unsure whether to leave them or not. The sign for the junction as you go west on the A690 towards it still shows it as a roundabout (it seems to be the same sign that was there before the junction update), and it does behave somewhat like a roundabout with traffic lights

Oops, yes it should have been, good spot.
I've now corrected it (changeset/41018159)

I replied to the note, but your comment there was anonymous, so I'm copying my comment here:
Thanks, although we need to be careful about using data from Google Streetview, due to copyright concerns. See the discussion here, for example:
https://help.openstreetmap.org/questions/710/can-i-use-google-streetview-to-help-create-maps

I looked at satellite imagery for each change that I made, making sure that it was actually grass there. There were a couple of odd tags I'd found where I couldn't be sure what it was meant to be, so I left it as it was.
Maybe I should have made that clear in my changeset comment, sorry.