Just remember, if they really want it, they’ll have it no matter what you do to it.
All you’re doing is slowing them down. You’ll need to balance how much you can with what would stop you from enjoying the bike. Personally I struggled with daily use and carrying a chain back and forth to work (plus cover as I didn’t have anywhere to leave it). Within a month I was just using a disc lock at work. Then we got underground parking.
But still at home I was getting fed up, especially in winter after a commute, when I was wet and cold, having to spend mins in the cold trying to put cover on, loop chain through. Meanwhile my helmet was getting soaked cause there was nowhere dry to leave it… soon I only was covering it if it was staying for more than just overnight
So the other thing to consider is how flash/new/dope (insert acronym here) bike you want to get… If I was buying for daily use in London, I’d be buying something I wouldn’t cry if I scratched… Because you will…
Don’t mean to be dispiriting but leaving a nice shiny bike on the streets and using every day in London, it’s only a matter of time till someone knocks it, tries to steal it, or actually succeeds in getting it