"foreverArsenal" wrote
On tipping them out and freeing them from the soil in the tub I found
couple dozen tiny(5mm) white with light brown head grubs(maggot like) ,only
the odd bulb had small hole in-2-3mm



Sound like vine weevil. Take a look here to confirm
http://www.vine.weevil.org.uk/ That site also gives advice on how to deal
with them.