Thousands of Afghan citizens, allies and colleagues were evacuated from Kabul as part of the larger withdrawal effort this past August. Included in those evacuated were some of the lucky Afghan special operations forces who managed to evade capture by the Taliban. The UK has taken in such a large number of these commandos that they are considering standing up their own specialized unit within the British Army.
The British military already contains a similar unit of soldiers hailing from the mountainous regions of Nepal, the Gurkhas. The Gurkhas were first encountered during the British colonization of India. Impressed by the skill and tenacity with which they fought, the British formed Gurkha units within their own ranks.
The Afghan fighters have an equally fearsome reputation for warfare but the US special-operations community has had mixed experiences serving alongside them. Standing up a British-Afghan unit may be achievable in the short term but long term recruitment prospects from Afghanistan would pose serious risks.