Hi Joe2,
Earlier in this thread in reply to my question about large containers of tomato ketchup you said that it is for non curry eating people in the restaurant. If that was the reason it was there where is the BROWN sauce. And also there are usually very large plastic containers of English Mustard, I asked at my local supplier and he told me the restaurants use it in the curries.
In addition you comment about tomato ketchup containing vinegar and that would spoil a curry, this is completely incorrect - Tomato Ketchup is used quite widely in BIRs I was trying to find out how much other members know about it's use. Furthermore, far from vinegar spoilling a curry, you try telling that to anyone who likes a good Vindaloo that, It is an essential ingredient, in my humble opinion.
You may be trying to help Joe2, and if that was your intention I am sorry if my reply offends in any way,
cheers Joe2,
Blondie