Practical Prescriber (Sixteenth Edition) published by Dr. Aspi F. Golwalla MD, FACC, FCPS, FCCP and Dr.Sharukh A. Golwalla MD (Med) DM (Card), FCCP. (ISBN No.978-93-80206-22-6)
Hello, gangadharan_nair. You post in a very directive manner; almost in the manner of some health care professionals? Are you a health care professional (doctor, nurse, educator, or the like)?
As you are finding out, many members like to understand the source of an suggestions, so that they might do their own background reading and research.
In the UK, there is a widely help understanding that no single approach is appropriate for everyone. For Type 2 Diabetics, there appears to a less tethered approach to high carb eating, than in some other countries.
Of course, that doesn't mean all T2 diabetics need to reduce their carb content for a good outcome, but many do, when faced with the alternative of starting or increasing medications.