Well, thanks to Svennn the DHnut, Westfalia Chris and Ink the Troll on Frothers, I have become the proud owner of this little band of hastily blu-tacked together Celt warriors:
There are a few Chronopia and Celtos minis in there (all the mounted ones) that I bought new, but most of it is made up of parts of other people's lead mountain.
Svennn sold me a couple of chariots as well, but I need to see if I can replace the horsies with something a bit chunkier as they look tiny compared to the Celtos ones.
Thanks to everybody who has helped out. Couldn't (and probably shouldn't) have done it without you!