Bryan Warnett track bike info

[bikers666]

Hi, I've just got hold of this Bryan Warnett track frame no. 26679 and also no. 17 stamped separately on the other side of bottom bracket.
I guess it's from 1979 and would the first three numbers mean 26th June? Perhaps the no. 17 means 17th frame built?

 

[joe careless]

I believe that might be one of a pair. Search Bryan Warnett on here