having just read a lot of posts on this subject, I’m surprised not one person has quoted regulation 433.1.204
“Accessories to BS 1363 may be supplied through a ring final circuit with or without unfused spurs, protected by a 30A or 32A protective device complying with BS 88 series, BS EN 60898...” (remainder of regulation talks about OCPDs and CSAs)
A ring final circuit is not permitted to directly supply anything other than a 13A socket outlet or a fused connection unit.
“Accessories to BS 1363 may be supplied through a ring final circuit with or without unfused spurs, protected by a 30A or 32A protective device complying with BS 88 series, BS EN 60898...” (remainder of regulation talks about OCPDs and CSAs)
A ring final circuit is not permitted to directly supply anything other than a 13A socket outlet or a fused connection unit.