Is Gurdwara Singh Sabha - Southall a missionary centre?

Are their missionaries and nastiks working there?

Please note the kathakars of Dam Dami Taksal that have done katha at Singh Sabha in in the last few years:

Baba Ram Singh ji
Giani Avatar Singh ji Badni Kalan
Giani Pritham Singh ji
Giani Gurmail Singh ji
Baba Hari Singh Randhawa
and amny more belonging to other traditional organisations.

S Virdee
Sec Singh Sabha.