Given that the largest Indian populations in Britain are Punjabis and Gujaratis, i.e. Northern Indians, wouldn't the opposite be the case?
Punjabis in UK seem to be mainly Ramgharias, this look is mostly found in Jatts. Gujaratis have light types but not like this women from my experience.
I think its just the pictures in the OP that make her look depigmented. She has a light Brown complexion with make-up:
http://www.essexchronicle.co.uk/imag...1878-large.jpg
https://johnaustinaudi.files.wordpre...iti-patel1.jpg
Priti's look I find similar to Reshma Merchant (wife of Musician Sulaiman Merchant- both Gujaratis):
http://www.bharatstudent.com/ng7uvid...-day-2_035.jpg
http://www.bharatstudent.com/ng7uvid...launch_040.jpg
^Though Reshma has a longer face.
Roopal Shah (senior executive at Johnson and Johnson) also has that similar, robust look:
http://www.thepositiveoutcomes.com/images/rupalShah.jpg
bro she look more like this jatt Punjabi lady
http://i58.tinypic.com/34g0qk6.jpg
She has ''brown'' skin, maybe not being dark brown is throwing singh off.
She looks like a British person with a different pigmentation.
This was her pic in the OP and what she looked like on TV.
http://i57.tinypic.com/2unwl4z.jpg
She doesn't look brown in the traditional sense.