I had a quick look at various articles, and thought this worth a read, especially some of the comments......
Parking on the pavement - is it illegal? The definitive answer.... RAC view
Article and 105 comments plus a poll
https://www.rac.co.uk/drive/advice/legal/parking-on-the-pavement/By Roy Stobbart
"The issue here is that in many areas street parking more or less demands vehicles to park with 2 wheels on the path/verge. This is not just older housing estates but even roads in new estates are being built to the minimum width.
The potential new rules to be applied, as described in the above article, suggests motorists would be OK as long as the road required it. This needs a reasonable decision to be taken by the motorist.
Unfortunately we all know that there are a large number of motorists who do not behave in a reasonable manner or even consider the impact on others of where or how they park.
We cannot even rely on motorists NOT to park in "disabled" or "mother and baby" bays, even though they are clearly signposted.
If it is convenient for them to do so then they will park anywhere.
Unfortunately for the majority of considerate motorists the Dept Of Transport is more likely to base their considerations on treating us all as if we are inconsiderate of others
Likely outcome - they will bring in new parking rules, over zealous wardens will book as many as possible and the government coffers will find a new, highly rewarding, means of income.
When you are booked for parking how can you contest it? It will all be down to arguing the subjective meaning of the word reasonable and hearings will have to decide whether it is the warden (doing their job??) or the motorist (looking for space in a congested area) who has interpreted "reasonable" correctly - and that is down to a subjective judgement by the hearing"