I am beginning to think that we are the only 24 hour locksmiths who work the weekend in Preston, particularly the Friday and Saturday after midnight. The last two weekends have both had a call out where, whilst chatting to the caller at the door, they have offered the fact that they had called at least 4 other locksmiths each before getting to Lancashire Locksmiths. We were, of course, happy to help, and both jobs were done quickly and neatly, and non-destructively, and for what we think was a fair price.
Of course, one lady who called us at 4am to get a price for fitting a spyhole in her front door was suprised at the cost, but at 4am on a Saturday morning, our prices, like all emergency and on-call services, are somewhat higher, both for being the weekend and for being well after hours! (An extra £10 each, should you be wondering) She called back somewhat later, and we did the job for somewhat less, during the daytime. 
Of course, had the customer felt it was an emergency, we would have attended within the hour, as normal.