Newtronstar.
I've had a look at the link
http://www.rob-r.co.uk/other/UKphonecatwiring.htmIf you are using these instructions I would just make a couple of points.
1 I've noticed he has left the wires very, very short before terminating them. Its understandable to leave things tidy and keep as much wire short from picking up interfence. But always assume that if ever disconnecting a rie from a IDC, that you are not going to reterminate on the same bit of wire, but a new part further back. if ever reterminating, those wires get shorter. Engineers would normally start swearing under their breath when finding sockets with wire so short as on that web site. Often have to do the messy thing of "Piecing out" by adding a crimp with an extra new lenght of wire so that it will reach the IDC.
2 he's tied (the plastic wire ties) on the inner wires not the outer insulation. the outer insualtion is there to take the mechanical loads on the cable.
I always did "butterflies" . I would have the outer insualtion to where it was tied, the inner coloured wires I would extend as far as the opposite corner of the socket to the IDC terminals it was intended, before folding back 180 degrees and then terminating on the IDC. You get two loops like a shoe lace. or butterly wings. I'ld just bend these over over the top of the socket hole where a cable plugs in.
Its tidy, leaves plenty of spare for future work. No round open loops or coils to pick up interference. And not really that much extra possibility of picking up interference from those extra 70mm of wire.
Incidentley, terminations 1 and 6 marked as not used. Some times thses can be used to "push forward" onother pair of wires, if the building has a second line going to another NTE, extention socket, alarm unit in the building. So careful if these are connected before disconecting them.
The original intention for 1 and 6 was for power. The idea was a small transformer could be plugged into a power socket, a phone plug with additional DC power on terminals 1 &6 plugs into an extention. so any other phone equipment could get its additional power supply of its extention from 1 & 6.
As almost all equipment that needed additional power comes with its own mains adaptor, this was hardly needed. Only came across this sort of set up a few times. Once the visit was due to some one disconnecting the green 3rd pair fron an extention. The alarm system would not work. No power.