For 1950's ex corpo houses it is important to get someone who knows what they are doing. These have steel brackets which sit across the top of wall to hold the gutters. The brackets have often rusted through at this stage, replacing them requires lifting roof tiles. Jack de Lad will just screw modern brackets into the wall with raw plugs and use moden style gutters which will not properly join with the neighbours. These will only last a few years. Proper iron replacement gutters and hangers are available.