I think you'll have a bit of a job to tick all of the boxes tbh.
For a start, low-theft-risk usually means cheap and tatty, which usually also means not-so-great technically. It obviously depends on how anxious / risk averse you are but personally I'd not entertain the idea of leaving anything locked up at a train station other than a complete tatty rotter; otherwise it's bound to go missing.. and even then it's likely that the local smackheads will still show some interest as a means of chasing their dealer round the city..
I'd expect a shopping hack to be a bit safer, since it's less likely to be left for any enormous length of time and perhaps in a less thefty location.
For what it's worth I have two utility bikes - a somewhat (intentionally) tatty and almost worthless Raleigh Routier that owes me about £30 and is intended for the most dangerous missions - being left outside the pub in dodgy areas etc.. I've also just bought a Fuji Touring that'll probably owe me a couple of hundred quid when all's said and done - nicer and more capable / better for longer journeys, but I'd not feel comfortable leaving this for more than maybe 20 mins while I'm in the supermarket.. however I'm very risk averse.
I appreciate that these don't tick too many of your boxes so not necessarily recommending them; although the Fuji has quite a lot of stack and you could always make it more relaxed by flipping the stem / fitting one with more rise. I'd certainly recommend something similar for longer utility journeys, but it's probably a bit un-necessary / overkill for short urban trips.
These aside I think your best bet would be a modest, modern hybrid of some sort - which will give you most of what you want with the exception of a chain case.
Alternatively if you wanted to go old school there seem to be plenty of nice old British town bikes around for not a lot of money - some examples from ebay (not nec. endorsements):
This old Raleigh; maybe from the '50s:
Something more modern perhaps - Raleigh seemed to do some now-super-retro-cool town bikes in the '70s, like the Esquire and this Traveller (without the gash bar extensions):
Or this Mahatten:
On the one hand I'd feel a bit bad leaving something with so much character that's survived for so locked up at the mercy of light-fingered scallies; on the other hand it's far less likely to appeal to theives than something modern - certainly from the perspective of resale.
Obviously the older stuff won't be so good in terms of performance (worse brakes, three-speed hubs with a limited range and big jumps) but for short town journeys this is less of an issue..
Oh, finally prices on ebay always seem to be "optimistic" so (if you can tolerate the high proportion of knobheads) FB marketplace isn't a bad place to look.
For a start, low-theft-risk usually means cheap and tatty, which usually also means not-so-great technically. It obviously depends on how anxious / risk averse you are but personally I'd not entertain the idea of leaving anything locked up at a train station other than a complete tatty rotter; otherwise it's bound to go missing.. and even then it's likely that the local smackheads will still show some interest as a means of chasing their dealer round the city..
I'd expect a shopping hack to be a bit safer, since it's less likely to be left for any enormous length of time and perhaps in a less thefty location.
For what it's worth I have two utility bikes - a somewhat (intentionally) tatty and almost worthless Raleigh Routier that owes me about £30 and is intended for the most dangerous missions - being left outside the pub in dodgy areas etc.. I've also just bought a Fuji Touring that'll probably owe me a couple of hundred quid when all's said and done - nicer and more capable / better for longer journeys, but I'd not feel comfortable leaving this for more than maybe 20 mins while I'm in the supermarket.. however I'm very risk averse.
I appreciate that these don't tick too many of your boxes so not necessarily recommending them; although the Fuji has quite a lot of stack and you could always make it more relaxed by flipping the stem / fitting one with more rise. I'd certainly recommend something similar for longer utility journeys, but it's probably a bit un-necessary / overkill for short urban trips.
These aside I think your best bet would be a modest, modern hybrid of some sort - which will give you most of what you want with the exception of a chain case.
Alternatively if you wanted to go old school there seem to be plenty of nice old British town bikes around for not a lot of money - some examples from ebay (not nec. endorsements):
This old Raleigh; maybe from the '50s:
Something more modern perhaps - Raleigh seemed to do some now-super-retro-cool town bikes in the '70s, like the Esquire and this Traveller (without the gash bar extensions):
Or this Mahatten:
On the one hand I'd feel a bit bad leaving something with so much character that's survived for so locked up at the mercy of light-fingered scallies; on the other hand it's far less likely to appeal to theives than something modern - certainly from the perspective of resale.
Obviously the older stuff won't be so good in terms of performance (worse brakes, three-speed hubs with a limited range and big jumps) but for short town journeys this is less of an issue..
Oh, finally prices on ebay always seem to be "optimistic" so (if you can tolerate the high proportion of knobheads) FB marketplace isn't a bad place to look.