Chart of immigrants stats in Slough (2011 census)

Figures from the 2011 census showed that 41.2% of Slough's population identified as Christian, 23.3% as Muslim, 10.6% as Sikh, 6.2% as Hindu, 0.5% as Buddhist, 0.1% as Jewish, 0.3% as having other religions, 12.1% as having no religion and 5.7% did not answer the question. Slough has the highest percentage of Sikh residents in the country according to the census figures. Slough also has the highest percentage of Muslim and Hindu residents in the South East region.

Reference 1: Number resident.

Reference 2: India, Pakistan, Poland, Kenya, Ireland, Zimbabwe, Somalia, Sri Lanka, Philippines and Afghanistan.

Source: http://en.wikipedia.org/wiki/Slough