Last year I had an extension put on the rear of my house with a new guttering fitted. Recently the guttering has started leaking heavily at what looks like a joint. I have no experience in guttering so I may be wrong but can someone tell me from the photos if it has been fitted incorrectly and if so then how to rectify this issue please (I removed clips in final photos to clean out the joint) Happy to supply any extra information if needed. Thanks in advance.