I have a base gravy on the cooker right now. Not vegetarian, which doesn't matter because I'll be making a Lamb curry as soon as it's done.
Edit:
The thing is that there really is nothing different here, however, it has inspired to me to make a New Years Curry Dinner. The Mixed powder is nothing extraordinary. Unless we know the brand and type of curry powder in it, it is anybody's guess. The Base Gravy is simply a version from the days when chicken (or carcase) was added. I've done all of this before and I'm sure most of you have as well. Does it make good curry? Sure does. Is it reminiscent of 1960s or 70s BIR. I have no idea from over here having never tried anything other than what I've been able to replicate from this site and others.
Curry on chaps, and ladies if there are any still around.