Hello and thanks for using Just Answer.
I am Al and am happy to assist you with your enquiry.
It basically means that you have the following rights over the adjoining property/land (which is the neighbouring property/owned by the person who sold you your property- let's call it "Land X")-
a). A right to connect to any existing gas/electric/water/drains which are on Land X- to enable your Property to get connected to these services if your Property needs these connections.
b). This just means that if your Property and Land X share a common wall (ie you are linked or are a pair of semi detached properties), then the owner of Land X will not remove or do anything to this wall which may affect the stability of your wall.
c). You have a right of access onto Land X, with or without workmen/people you instruct, for the purpose of maintaining your property or for the purpose of connecting to any services as mentioned in a).
I hope this assists and sets out the position to you.
Excellent! Many thanks.