What is the name of the Special episode that you say is the "last special"? By last special, are you talking about the last one to air? If so, it looks like S00E34 would be the correct answer according to TVDB. Another confusing factor is that TVDB rules require the series to be listed by the channel/station on which it originally appeared. That would be BBC One. But S00E34 and S00E35 are listed as being on Channel 5 which, by my mind, that violated TVDB's own rules.
I'm in the US, and I've never heard of Only Fools & Horses. It's not one of the many British series that made its way across the pond, as far as I can tell. I'll try to track down its episode history. If it is wrong on TVDB, I'll be glad to make the corrections at TVDB. Did you check to see what TMDB has in their database?