Its annoying, to buy a stock item, then have to bodge it.
Like watching this guys exploits, and asks the valid question about cyclists using Public Footpaths, not Bridleways.
One thing I cannot abide with cyclists is that they tear up right beside where you are walking, with no indication at all. No shouting, no bell, its just whizzing right by. Now this is dangerous if I have the dog on an extendable lead, sniffing around doing her thing.
It certainly is. I haven’t looked into whether there is one with a narrower fitting.
Having had a Zefal handlebar mirror on the previous bike (a Marin), I just had to find a way of fixing one on the Claud Butler.
The handlebars are aluminium and enlarging the hole by twisting the chisel round and round did the job but it took a while. I was a bit worried about damaging the bar but it turned out OK.
It fitted without all that bother on the e-bike’s handlebars.
I have seen a cyclist with a mirror fitted to the forks but I think looking down at that might mean diverting the eyes off the road ahead too much.
Edit: Thinking about what I did. It was as much about using a longer screw. I wonder if that might be all that is necessary with your fitting? Because the screw is longer, it means the expander doesn’t have to be inside the tube to start with, so making it that you can squeeze the fitting up a bit more in order to insert it. Just have the expander nudging up against the tube so it doesn’t turn when tightening the screw.
Gonna swop the electrics onto the Saracen mart, after that trip on the bumpy stuff under electric power, the none suspension bike nearly disintegrated, the mirror may fit in in that handlebar.
Watched a good EMTB video last night on a trip along the Leeds to Liverpool Canal, he got on in Leeds and exited at Apperley Bridge, not familiar with that part of the country, but it was good to see the Canal and River Aire running parallel.
Yes, nice to take a slow ride along a canal towpath taking in the in the views and appreciating the wildlife. We have a canal near us but it’s ages since I’ve walked or cycled on it. Very hard to stay apart from other people there. I miss it quite a bit.
A ride I’ve always fancied making is one that would take me over the Humber Bridge. Travelling to Withernsea from Doncaster took us near the bridge but the people we stayed with weren’t into biking, so I don’t think cycling across it was ever on the cards. Something I thought about every time we made the trip though.
I live very close to the river lea/lee. Which is also a canal. In the past I had cycled most of it. What I would do, is do a part of it, and return. Next drive to the last turning point. And do the same with the next section. Also got the river Stort that branches off the Lea.
River Stort. Not an ideal ride for my Brompton.
Why do my pics appear the wrong way?
I downloaded your picture so I could turn it round and look at it the right way up. The scene looks a lot like the Basingstoke Canal towpath Emjay. Plants left to grow, which the wildlife loves.
Looks good and quiet Emjay, that is the trouble with canal rides, the Towpath out to the city boundary is well wide and maintained, but, naturally attracts a lot of users, as you get out into the country, less folks to worry about but more mud and potholes.
Way to go Mart!
Off to Brum on the Mountain Bike this morning, getting a bit idle with the Ebike.
Back at the car the £37.00 Mountain Bike, had a nosey at the HS2 works.
https://i.ibb.co/WB6LrQZ/BC90523-A-51-F1-4-AA3-ABD3-2-CE3741-E8930.jpg
The photo certainly shows you have been on a muddy ride. The bike is very good value for money. 
I’ll probably ride the ordinary bike when the weather is nicer. I’m only riding now if I want to get something done rather than for exercise. The e-bike is better for that.
Still keeping the legs and lungs in fair condition with daily indoor exercises.
Just done 8 miles on the Ebike, used throttle only for the last 1.5 miles so I could take in the countryside.
I have one of those thumb throttles but ordered a twistgrip yesterday, after yesterdays ride it occurred to me that pedal assist on long roads or lanes is a bit laborious so, when I get the Sur-ron, I will restrict the converted bikes use to Country Parks, or the Canal Towpath or the like, it comes into its own with the power take up and, until you have passed folks, they are unaware of its motorised status.
Just been through the Country Park and onto the Canal, there are people everywhere, got fed up of riding silently behind folks on the footpath then, when you got round the motor kicking in gave a couple of interesting moments on the narrow muddy towpath. had to get off at the anonymous bridge where the photo is taken and take my chance with a farm track, all went well in the end.
https://i.ibb.co/TTHTfPs/0-C8-FDA35-EDBF-45-F4-A14-A-CEE705-F2699-B.jpg
Looks like a lovely day! Also, Beep people out of the way, or yell “Excuuuuuuse me” as you pass by. Having said that, busy is not the way of things right now so…maybe yell “social distancing!!” at them instead 
A good day for a ride.
Pixie, I am too polite, in main street to yell at anyone, so will always try not to startle walkers.
mart, a great day to be outdoors, will do the same ride tomorrow, when no folks are about.