this place is not a direct line to VM - staff will get to the thread but it could take a while - you need to ring for quicker access - in the mean time
start outside and look for the external wall box - 6" square ish usually on wall facing road or pavement - brown or grey usually - follow any cables that come from it and go inside - if there are non look inside opposite external box as they may just have drilled through wall - as said it may just be a cable rather than an internal wall box
post photos of what you have and what you find
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Tony