There is no requirement to check with neighbours under the Building Regulations proposal. However, it would be courteous to advise your neighbours of the proposed works.
If the proposed works are subject to the provisions of the Party Wall etc. Act 1996, your neighbours may need to be informed. Further information can be found on the Department of Communities and Local Government (DCLG) website.
If an application for planning permission is made, neighbours who may be affected by the proposal have the right to make an objection.