Unfortunately YES. If 3 phase is common in homes it is a shame the Corsa isn't available with the 11kW charging option there.Will it take just one of three phase lines, giving a maximum of 3.6kw (220v x 16 amps)?
How many miles do you drive a day? Charging for 10 hours overnight would be around 30kWh so a decent range. I often charge my Zoe at 16A as my Podpoint Type 2 charging point replaced the Type 1 from Ampera and wiring can't cope with much more (it probably could do 20A).