New Delhi, July 22 -- The presence of Khalistani extremist groups and their activities in the UK continue to be a niggling issue in the India-UK bilateral relations, as Prime Minister Narendra Modi embarks on a two-day official visit to Britain tomorrow.

Foreign Secretary Vikram Misri, briefing reporters on the PM's upcoming visit to the UK, said that the matter "is a cause of concern not only to us, but it should be a matter of concern to our partners as well".

"The issue has been something that we have brought to the attention of our partners in the UK. We will continue to do so. This is a matter of concern not only to us, but it should be a matter of concern to our partners as well, because this impacts social cohesion and social order...