You will need to add a codicil to your Will. The wording should be as follows.
WORDING FOR A BEQUEST
I give........................................................ to the Trustees of the Pontifical Beda College or their legal successors to be applied by them for or towards such lawful charitable purposes as they shall in their absolute discretion think proper in connection with the Pontifical Beda College.
I declare that the receipt of the Chair of the Beda Trustees at the time of my death or his legal successor shall be a full discharge to the executors of my will in respect of this Bequest.