Ah... I do like the heady whiff of nostalgia. While it's often tinged by eclectic memories that have, over the years, acquired an enhanced level of idealisation, in the strange case of past vs present BIRs there is no doubt that things are not, indeed, as they used to be.
I suspect that there are many factors which have contributed to this, but one which has come about in recent times is the so-called 'curry crisis', which has received a fair bit of media attention and was brought to light by Julian in the C2G e-book. (For those that haven't heard about it, in a nutshell UK immigration policy changes have resulted in a shortage of Bangladeshi/Indian/Pakistani/ chefs, which means it's so much harder these days for restaurateurs to staff their kitchens with old-school talent.)
But whatever the reasons, it is the death of 'the taste' that continues to drive me ever onwards in the BIR quest. I've mentioned on here before that the Holy Grail for me has always been to reproduce the stunning and super-intense curries I enjoyed in Scotland in the early 80s (Glasgow and surrounding area).
To date, the closest I've managed to get to this intensity of flavour has been through the use of a good bunjarra (spicy onion paste). The one I make now combines the best of both worlds from the Ashoka bunjarra on here, and the oinion paste in Mick Crawford's (CBM's) book.
To those who have yet to try using bunjarra, I thoroughly recommend it. Okay, it's a bit of a faff standing over those onions for the best part of an hour while they slowly caramelise, but you can make enough in one go to fill an old Patak's jar, and as you only use a tablespoon or so in each curry it lasts a good while (keeps for a good few weeks in the fridge).
Do give it a go. And if you like it really intense, try to leave the curry overnight for eating the next day. As many of us have found, this often works wonders for our curries as our senses have had time to recover from the cooking process, but the intensity levels when you do this with a curry made with some bunjarra are off the scale...