1ft land taken by neighbors new fence

[Markus19]

Hi guys can anyone on here give me some advice me and my gf are looking to buy the house that has came up for sale over the road from us since the current occupiers have moved out and put it up for sale the next door neighbour has pulled down the dividing hedge that splits the property and erected a 6ft fence 1 ft over onto the property for sales land... can anyone advise what we can do about this can we speak with the estate agent while viewing which we have booked in tomorrow