Thanks spicyokoko! I think you hit the nail on the head. I am extremely critical about my food. The few guests I've cooked food for so far, have all provided positive feedback, but being a little paranoid, one has to wonder whether they are just being sympathetic or whether they would be the kind who would eat anything and always find whatever is given to them good, within reason. I know my girlfriend loves my food, but I also know she's not very critical of whatever she eats (however, she disliked the butter chicken yesterday) and I think this may very well be down to the irish people in general. My girlfriend and her family would eat chipper quite regularly, given the choice of indian or chinese, they'd be more keen on latter, hence, I have to rely highly on my recollections of what proper indian food is and again, it is entirely down to my experiences in a single city in UK.
When I tried CBM's base for the first time, I had previously made the C2G base (although I've never squeezed the vinegary aroma out of it during its cooking as required, so the result may not be the expected or what most get) and I thought that both bases were identical in terms of flavour and smell. After yesterday's disappointment, I kept wondering if this common flavour between bases (CBM, C2G) would be the standard Bengali base-flavour in other parts of UK, because, as far as I can remember and it's been 6 months since my last UK curry (admittedly, memory may be jaded by now), I've never had any curry resembling this flavour in whole or in part -- and It's not like its bad, but it just isn't what I'm after. The restaurants in Cambridge all had a savoury edge to them. Their base had nothing in common with this one or any on this forum. It feels minimalistic in comparison.
If I decide to fly into Manchester as has been discussed, I will be taking a day to visit
Manchester, followed by bradford and then head towards Cambridge. This should give me wider exposure to 2 other important regions when it comes to BIR.