After a bit of research I discovered that if more than 6 people live at one address or there is a child in disposible nappies at an address, then the said address is entitled to an extra green bin to put your non-recyclible waste in.
on 0151 - 606 2004, between 09.00am and 5.00pm.
My better half rung them the other day, told them that seven people are living at our address, of which two are babies, both in disposible nappies. No questions asked, their response
was "We will deliver a 2nd green bin to your address within 10days, sorry for any inconveince"
Will keep you posted on whether it arrives.