An interesting topic! Some names that were familiar to Serif customers over the years.
Patrick Connor, Dale Cook are definitely remembered. And wasn't Gary Bates a senior member of the team?

I recall Gary Bates’ name appearing in Serif’s mailshots. I think he was the company’s Managing Director (or MD, equivalent to CEO) for several years. It seems that both he and Jim Bryce were co-founders who retained a significant stake in the company until it was acquired by Canva a couple of years ago.

LOL.

And of course, if we are talking about Serif "employees", we should not forget "Natasha".

There was a guy called Jon Something (beginning with P) who was one of the main programmers (can't remember whether he was on PP or WP).

When Toby Sharp (the brains behind MoviePlus) left to join Microsoft Research, Jon White took over as the MoviePlus project lead, but he would have worked on other projects when — or perhaps even before — development of MoviePlus was discontinued.

There is or was a Jon P (Parsons?) on the QA team.

It was Patrick Connor who invited me to beta test PP9.04, the version where the short-lived SerifPrintStore was added on, but I remember Dale Cook being involved, too.

I seem to remember that Patrick joined Serif to work on PagePlus 7. He may well have been the lead programmer for PP7 or PP8. (‘PagePlus 8 PDF Edition’ has always struck me as something of a misnomer, since PP8 can’t open files saved from PP8PDF, but I’m guessing that that was a marketing decision.)

Dale was the principal documentation guy. Although he was heavily involved in testing, I don’t think he was a programmer.

I was still skipping alternate versions at the time, so I didn’t use any even-numbered versions before PP7. However, I remember reading that there were major problems with PP4.

(I use X15)

The last version of PagePlus is X9. There is no X15. Version 15 was X5

If I remember correctly, Patrick Connor, who is still active on the Affinity forums (I believe) was largely responsible for PagePlus 8PDF and I'm sure had a lot of input on the subsequent versions.

Dale Cook was a guy who worked on earlier versions. He subsequently emigrated to Australia.

Way back, I had a program called Window Works, by Spinnaker. It included a word processor and a basic publishing program. I think that there was some connection with Serif, because out of the blue I got an offer from Serif to get PagePlus 3 as an step up. There was also some connection with Harvard Graphics, which Serif marketed at that time. My memory is a bit vague on the details. I had started producing a monthly magazine, and after the first issue I did, using Window Works, I changed to PagePlus, and have used it ever since, although I no longer dothe magazine.

I remember PagePlus 4 had a few problems and crashed a lot, so I reverted to version 3 until 5 came out.