snip
Trouble is I can't find any syringes at all in B & Q, Wickes, etc. I
suppose I could use one of those would glue bottles with the screw top
pointed nozzles, but a syringe allows for higher pressure which will
help to ensure maximum coverage.

Hi Saeed,

Had to do this myself so I dug a used silicone tube out of the wheelie bin,
unscrewed (eventually) the nozzle and inserted one of SWMBO's finest
knitting needle into the hole (Backwards, holding pointy end or you risk
puncturing the disk) to force the plunger disk out. Clean the tube / nozzle
/ plunger disk then fill with pva

Reusable a few times, too

hth
--
Jet