The latest discovery, pointed out to me by Matty is that of the Walsall 12x1st Retail booklet reprinted without the Printers Imprint on the back cover. This booklet was issued on 15th December 2009.
Not what some people may call a big deal, but to collectors of booklets it is a variation of the norm so I have reported it here.
The following two side tab variations have been found.
Normal narrow side tab (5mm) at right. Cylinder numbers seen to date are W5 W1 ph W1
Wider side tab (8mm) at right. Cylinder numbers seen to date are W5 W1 ph W1