Years ago the police apparently used BKS leathers, so would assume they're pretty rugged. Never owned a set myself though so no first hand experience.
Minor issue with that particular item is they've called it a 'Tiger' jacket, but put a picture of a lion on it!
There's two different BKS companies.
The original BKS are hand made in Devon, they'll do made to measure and they are the company that made the police kit that you refer to. They're probably the best leathers you can buy & the price reflects that - they start at about £1,300 a set
The 'other' BKS was owned by Frank Thomas, they are produced in Asia I believe & apparently the original BKS owner sold them the rights to use the BKS brand name & provided some input into the designs.
After FT went bust J&S bought the brand name & are still selling them, I've not owned any of that range, but they are supposed to be good value at the price.
I've owned a couple of sets of the hand made BKS leathers (including a barely broken in set of the police leathers bought off ebay) and the quality is outstanding with good thick leather, but a consequence of the great protection afforded is that they are pretty heavy. There's no way I'd want to have to wear a set whilst doing an 8 hour shift astride a pan-euro in central London during the summer, you'd bake!