Altberg Jungle boots (microlite)(?) comes highly recommended, albeit only by me! They are yards better than those issued by pusser, or even the slightly more in vogue US jungle boots. Another bonus of Altberg boots is the rot-proof stitching, leaving your footwear intact, unlike HM's finest.
Ah, back to topic. Lowa boots. If you have any sort of lower limb issues (MTBS. shin-splints etc), pop and see the friendly Unit MO and see if he'll give you a chit for non-issue boots. I've been resourced this way for years, on account of being prescribed orthotic insoles that do not quite fit inside the issued road-slapper. Saves me hundreds of pounds on boots.