Salaam Alaikaam, Muslim ji
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=2046
This is very dark and complicated.
I am afraid that in the UK, the "Sher-E-Panjab" are indeed a "they". Unfortunately all that I know is based on rumor.
There are reports in the UK, there are some extremist Muslims, specifically of Pakistani lineage, that have been forcing converting Sikhs and Panjabi Hindus to Islam.
Other reports say that the same group of said Muslims are specifically men that are seducing (or deceiving, or forcing) Sikh/Hindu girls via matrimonial ads with deeply romantic and glorious tales of luxury...but the end result is that the girl gets whisked off to Pakistan for a life of slavery.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=2046
Another extremist group in the UK has been reported to take action against these alleged forced conversing by "rescuing" these Panjabi girls. (How...I don't know). This group calls itself Sher-E-Panjab, or "Lion of Panjab." The group, however, is a group of Radha Swamis, not a group of Sikhs.
I am gonig to defer to someone else to describe who the Radha Swamis are. The best that I can say is that they are a seperate religion in Panjab that heavily utilizes Sikh imagery, and even borrows from Sikh scriptures...but in other ways has very deep conflicts with the Sikh faith.
Devotees say that the Sher-E-Panjab has been acting as the "real" lion of Panjab...in that they took action where the girls Sikh brothers did not. Some Sikhs may go as far as saying that the Radha Swamis say this/do this simply to make a mockery of the Sikh's kirpan which stands for defending against injustice.
I don't know how much of this is true. I have heard that there are some fundamentalist tensions brewing in England on many sides, particularly in the Indian and Pakistani communities. If the disagreements escalate in to battles of extremism, that will be a very bad day for all faiths involved.
Muslim, you are in the UK and I am not. If I may ask, what have you seen or heard in regards to this matter?
Respectfully,
Amerikaur