VictorL said:
The present one came from
ebay, and has lasted 8 months. I can't see any of the same design there, but this is similar.
http://cgi.ebay.co.uk/New-Black-Bic...trkparms=65:12|66:2|39:1|72:1689|293:1|294:50
The lock I have on my shed could be put round the seatpost as a bike alarm.
http://cpc.farnell.com/securesight/ap08/padlock-alarm-110db/dp/SR07375?MER=e-bb45-00001003
And also from CPC, but
I haven't tried one is this alarm.
http://cpc.farnell.com/_/sp50/cycleguard/dp/SR05490?MER=e-bb45-00001003
They nominally go down in sound level, but any of them will be physically painful at close range, to anyone with normal hearing. They will also attract attention, which no thief wants.
Nothing will stop a determined thief, but at least locks and alarms can deter them.
A friend of mine went back to her bike last Saturday, found her wheels, tyres and chain cut through with bolt cutters. The D lock through the seat tube, wheel, and bike parking stand was well scratched but had survived. B*****ds. Insurers (house policy) are paying up though.