S Fretwell and Son| Police Registered | Emergency Locksmith in Doncaster | Family Run | No Call Out Charge| CRB Checked S Fretwell & Sons is the premier locksmith in Doncaster. We provide a professional and efficient service to the residents of Doncaster and surrounding areas. Our aim is to be with you within an hour, if you are in need of an emergency call out. All our work is guaranteed for two years also. Police Vetted Established 20 years No Call Out Fee CRB Checked UPVc Door Repairs Lock Upgrades Lost Keys Burglary Repairs Antisnap Locks Locksmith Doncaster Our client base has been established by working with many Blue Chip companies, NHS, Police, HMRC, Large Supermarkets,Local letting agents, DMBC and many local schools.