Can anyone with recent touring experience have a bike lock they can recommend - and naturally it needs to be lightweight. My concern is keeping the bike safe whilst I am touring and leaving it outside shops to replenish supplies. Thanks.
Some towns do seem to have every scrote kitted with wire cutters, so a cable isn't good enough any more. A D lock or something like a Bordo is pretty much the minimum in a town now IMO, unless you are OK with a higher risk of ending your tour early for the sake of carrying a kilogram.Having said that. In my experience, there is not a scrote around every corner with a set of bolt croppers or portable angle grinder.
I make my own stainless steel wire cables
Will the bike be insured and what does the insurance policy say? Mine said a diamond level lock and they are not light.
As @steveindenmark says (and from experience) they will get your bike if they want it. You just need to be able to recover the cost, if it does go, by meeting the insurance terms. Or take something you're happy to risk. Have done 7 European countries in the last 7 years and never had a problem using a simple D-lock. The only place I've had issues is here in the UK.
Are you thinking about the Lejog?
My insurance doesn't specify that the lock has to buy any of the labels like "diamond". Doesn't even have to be locked if in a locked room. Not insured if left unlocked outside or in a shed, though.It will only be insured if you can prove you have a Diamond level lock.
Bolt cutters? A decent pair of butcher's scissors would cut that, although slowly. Still probably OK in most villages to deter casual theft.Not really touring, but the same use case - popping into a shop - I use a cable lock on my rides around the UK. My view is that it's relatively low risk - I tend to be in small towns/villages where there won't be that many passing bolt-cropper welding scrotes and the bike is only briefly unattended, and I try to leave it in sight of as much as possible.
A picture of my ancient cable lock:
https://www.cyclechat.net/threads/oldest-bit-of-kit.288717/#post-6848411