Thanks for all the replies ...

> Tom Boulding lanflord of Fagan's the famous session pub in Sheffield
> sings it. I'm a roman gladiator , six foot tall in my respirator. I
> wear sandlas and blue bangles , I've got a box of Roman candles.
>
> Sinister, dexter, sinister , dexter etc.
>
> Is that the one?

No, I don't think so, but it sounds promising!

> The man you heard was Dave Houlden , late Chairman of Maidenhead
> Folk Club , and a Superb Parodst . The Gladiaor song was only
> partly his being originally written WAY back bt one Bruce Campbell
> with verses added by Mister Houlden AND David Blagove so is NOT in
> The Dave Houlden Song Book .
>
> However the lyrics are available in this Thread

Yes, I think that must be the one, it certainly fits March Of The Gladiators, though I remember it has having more nonsense Latin in it.