Premium service appointment - change centre

Hi, I live in south london and looking for premium service appointment at Croydon but the site says the slot is not available for next 45 business days. However the slot is available at Sheffield. Can I book an appointment at Sheffield and change it to Croydon later or it is not possible? Their site doesn't clearly mention this.


Thanks,
Raj

Which slot is available in Sheffield, mate? All slots except in Belfast are filled.

You can if slot is available