Our garden backs onto our back-side neighbour's garden. Our neighbours have not always been particularly considerate over the past 7 years we've lived here.
There is a tiny fence separating our gardens and their garden is slightly higher than ours. They pile rubbish up at the bottom of their garden that regularly overspills into our garden and it won't be long before the weight of their garden and rubbish pile pushes over what little fence is there.
We'd like to build a retaining wall and a fence that's as high as is allowed. We're expecting resistance from our neighbours as they like to spend a lot of time stood on their rubbish pile looking at the view into our garden. Therefore, before we discuss it with them, it would be useful to know exactly who is responsible for the boundary however, looking at our title deeds I'm not sure.
Can anyone more knowledgeable than me shed some light on it?