Write a Request letter to a friend to accept trusteeship.
Dear Narain
I am in the process of making my will, and wonder whether you would be so kind as to allow me to appoint you as an executor and also a Trustee in connection with the arrangements I am making for the children.
Without wishing to belittle the service you will be doing me if you agree to this, I may say that the duties should not be too onerous. Your co-trustee would be Mr. Chander Mohan, an old friend of mine and a solicitor of the highest integrity, and in the event of the necessity arising you could call freely upon his expert advice.
Yours sincerely
Jagdeep