Many thanks for your efforts Chris.

Looking at patterns numbers 9744 through to 9752 in the 1970 workbooks, it looks like these pieces were produced in small numbers. Interestingly, it also looks like the majority were blown in the first week of February (only Boffo appears to have blown a number outside of this week). Of course this is a selection of 4 blowers working at Whitefriars at that time.
I’ve collated the attached information on these pattern numbers (just in case it’s of interest/use to anyone else). Where I’ve had difficulty reading handwriting I’ve used a (?) to denote. When I get a chance, I’ll have a look through subsequent year work books and see if there is any other information, pertaining to these pattern numbers, if there is, I will update.
I can rule out 9744 (at 8 inches), 9745 and 9747 (incorrect shape) for my vase, but not being able to see what 9746 and 9748 look like I can’t rule these in or out at present, however there isn't an exact match based on the attached collated information.
It would be good to understand if the shape of my vase matches either one of these two patterns or if it is a non-production piece. Would anyone be able to shed some light on these 2 pattern numbers? I will (as suggested) try to contact Ray through the WF.com and report back if I do get any more information.