Whatever the regulations about portion sizes are, they’re independent from the measurement units used. The government is allowed to regulate portion sizes of 56

Whatever the regulations about portion sizes are, they’re independent from the measurement units used. The government is allowed to regulate portion sizes of 568ml, 284ml and 189ml. Also, is it really illegal to serve a 150ml glass of wine in the UK? That’s insane… A 750ml bottle of wine is supposed to have 5 glasses in it, not 4.28