As a point of interest..... when reporting to BT about the faulty / noisy line, would it not be an idea to explain that the wiring from the pole to your internal socket, looks very very old, and could possibly be the source of the noise, otherwise they may only consider that a visit to the box at the end of the road, and to view the connections at the pole, may be enough of a "technical inspection"....
Looking at the small size of the box, it looks about 25 - 30 years old, (the one with the T for Telecom on it, looks as though it has been painted over a few times ! ! ) and definitely not the "modern" version that is fittted as an "end of line" termination box .....
for ref. you should only need two wires to make your phone work, they should be white with blue trace, twisted with a blue/white. (twisted pair) and these should be connected to number 2 and 5 (the middle ones of each side of the connection, sometimes you have an orange/white pair, which used to power the bell, (bell wire) and this is usually removed from the connections, as it acts like a long wire aerial and picks up noise from any electrical equipment, and passes it onto the "proper" circuit.
In your case, I would suggest you do not "mess" with the installation, as it is BT`s responsiblity to get the wires into your house...... and you are not allowed to touch their installation up to and including the first (master) box......
have a look at this page....
http://www.thinkbroadband.com/faq/sections/install.htmlscroll down the page after the main text, you will see pics
it will give you some idea what your "master socket" should look like .... (modern version)
