Indeedly.
A guy in Phones 4u told me that their phones were not locked "so I can use any sim in it".

Carphone Warehouse have apparently never sold locked phones, they arrive in their wonderful factory condition without branding. They however have never broadcast this, the reason being that the phone companies subsidise these phones so that customers will subscribe to their service.

Hence the same shops will sell a phone for say £110 with a £10 top-up and sim to Orange for example, but they will sell the exact same phone "sim free" for about £200.
Wonder how many people actually would buy it sim free, and wouldn't just chuck the sim card and save £££'s hehe