MAOD and is to be found near Rookery Farm just near the delightfully named hamlet of Genesis Green!. This mast which is one of the old BT microwave link sites is there, so called Wickhambrook I believe as it was connected to some exchange equipment in Wickhambrook village!.
As Terry sez its not much help without knowing where the receiver is located at all. If current reception is Almost OK then a loft installed aerial I would expect will perform better and it may well be that the serving TX is the Sudbury one, 'tho there are bits of that area, id Suffolk, where Tacolneston comes in that bit better and in some ways is less bother ...