SmartNet, is the first commercially available RTK correction service in the UK. It is provided by Leica Geosystems and uses the Ordnance Survey GPS control station infrastructure.  

There are several user tariffs available as follows:
1 Yr SmartNet NRTK Unlimited @ £2,000.00
1 Yr SmartNet NRTK Limited (40 Hours per Month) @ £1,200.00
1 Yr SmartNet DGNSS Unlimited @ £750.00
1 Yr SmartNet DGNSS Limited (40 Hours per Month) @ £450.00

Please note: in addition to the SmartNet annual subscription you will require a GSM SIM card that is GPRS APN Internet enabled to allow the SmartNet corrections to be received by your GPS receiver.