If it IS a lighting circuit, then, unless the connected accesories are capable of withstanding (20AX switches etc.), then I`d code 2 it mate.HOWEVER, if it was designed to work like that, (which is where sight of the EIC would help), then it would be a case of verifying that the luminaires & switches have not been altered, or the circuit extended with 1.0.
Zs could be an issue, too.
KME
edit: `pache: most domestic light switches are rated 5A, though 10 and 20 are not unheard of. The 13A limit is provided by the fuse in the plug - it isn`t possible to draw 32A from a double socket, OR expect the switch to make/break that sort of current. Yes?