Sayyed Mohammad Al-Musawi,
Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to religious questions. In the past, he has also spent significant time in India guiding the community.
We have many Hadeethes in our books that it is allowed to take interest from non Muslims who consider interest as permissible for them.
You need to follow the verdict of the Marji' of Taqleed.