If you're using an RCD (aka ELCB, GFCI for our American friends), split the lighting off *before* it, too, otherwise an earth fault can leave you in the dark while a machine spins down...
I went a bit OTT with my shed, teed off the incoming at the meter then through a 63-amp MCB, followed by a 100mA time-delay RCD at the house end, 10mm armoured cable up the garden to a metal-clad consumer unit with.100a switch, 6a MCB for lighting then 30mA RCD feeding MCBs for ringmain, welder, other shed, lathe and the sockets on the patio (a while I was there 'honeydo'...)
I fitted about a dozen double sockets, still wasn't enough...
Dave H. (the.other one)