'cafe' bike lock

Those wire ones look like they could be snipped with a pair of pliers or the cable easily wrenched from the casing. Visually not much of a deterrent either.

I have 2 thicker coiled cable 4-digit combination locks very similar to this Abus one for £13 on ebay. They feel solid, clicks are precise and the numbers are clear and easy to see, which is handy when you leave the pub a little later than planned

I use this for quick stops:

https://www.evanscycles.com/abus-1200-combination-chain-lock-EV167195

It is permanently wrapped around the head tube (in-between the top tube and down tube) so it's never in the way and weighs little at 136g . I feel confident enough that it can't be easily cut with pocket sized cutters and as the code isn't changeable I feel that it may be a little harder to crack too.

Any more current recommendations please?

I've got a 99p lock from Planet X. That's about '3% of the winter bike's value, so definitely not recommended for more than a quick cafe stop (in very low-crime areas). They do quite a few options for that price, although you need to spend £20 to get free delivery so not really worth buying by itself
http://www.planetx.co.uk/c/q/accessories/bike-accessories/bike-locks

robdaykin, i liked the look of that laptop lock so much i've gone and bought one. The noise it makes is what made my mind up. Cheers bud.

I use a Kryptonite but the Targus option is good idea.

Had a conundrum last year whilst road riding in France. Was going to be out all day and stopping for lunch/sightseeing in a town with a concern that the bike would be out of sight. After some thought (cables, chains, hip lock etc) I managed to work out how to carry an Abus Mini-U Lock I use for commuting. The barrel went in the seat pack (large Specialized one) and the U fitted quite snugly between the seat pack and the saddle (held in place by the straps). OK, it was extra weight but rather that than having the bike nicked.

My local 99p (you know, the chain of them) shop sells one that is a pretty good deterent and it costs........

They also sell a perfectly functional mudguard set for........wait for it.........