Brilliant. Thank you
@Willsmotorcycle . Ordered. That opening looks to be plenty big enough, even for my hands.
@v8-7 - goodness, I had forgotten all about those overboots. My dad gave me some when I first started riding in my early 20s. I've never seen them since.
I often used the poly bag trick when going out on the pushbike. Except my foot went into the bag before I put on cycling shoes to go out in the rain. Then cut/ torn off round the ankles. I've done the same with bike boots when my brand new Sidi Black Rain Evo fully waterproof boots leaked at the first sign of Scotland rain. First long tour on my first 1100. April 2000, cold, wet, but being the first tour, one to cherish and remember. I thought I had bought the perfect solution to cold wet feet, but they let me down badly. I am sure
that it must have been a rogue pair, as the name continues to be used. It was over 20 years ago and I have never bought anything Sidi since. "There's no education in the second kick from a mule."

Wet socks just drain away any warmth. I now use Altberg boots. (Hogg all weather microlight motorcycle touring boot.) Leather, breathable linings, vibram soles made for motorcylists by a company that makes walking boots and are used by police and army. I already had their walking boots, and these are made from the same base as those. Fitted in the factory with a pair of thin socks and a pair of thick winter hiking socks. In spite of their Austrian sounding name, the factory is about an hour away in Richmond, North Yorkshire. Plenty of air space around the toes, without ever feeling loose. Nik-waxed regularly, Always warm. Always bone dry inside.
I couldn't get my feet 'round the bend' of their standard police issue Clubman Roadster boot, but these are ideal - about a half size larger than my normal foot size to accommodate thicker socks for winter use, but still comfortable with thinner hiking socks in the Summer.
Expensive, but worth every penny. 16 years, 130,000 miles so far. They are a fair size, with a tall vibram, cushioned sole, and brake and gear lever operation feel and foot position took a little getting used to - but a little time was all that was needed - no adjustment necessary on the 1100 or the 1300.