Through the automatic doors at the front of the building (directly opposite Costa), then take an immediate right and take the stairs. Through the wooden double doors, 2.107 will be the first room you see. There will be signs and a greeter to help you.
Walk through black cast iron gates at church entrance, along gravel path to back, up the steps on the left and along the path to the hall. (NB this meeting is in the same hall as it has been for years, but the entrance is no longer from Willoughby Road.)