You have your latitude wrong, but probably just mis-typed, it should be North, not West, your longitude should be entered as 001.557 W.
When setting up a dish, using Usals, you first set up your dish, and motor, to zero, with no skew, rotation, on the LNB.
You then enter your correct Latitude, and Longitude, into the receiver, and use the receiver to send the dish to the chosen satellite, for setting it up, in your case 0.8W.
Once done you physically align the dish to get the maximum signal, from 0.8W, and carefully tighten everything up.
You then send the dish to your furthest East, and West, satellites, e.g. 42E then 30W, and check the signal levels.
It is highly unlikely that your dish is tracking the satellite arc correctly, at this stage, and requires some minor adjustments, to the brackets, if you are getting maximum signal, on 42E, and 30W, then you have been very lucky.
Usually you have to send the dish back to 0.8W, adjust the brackets, then again send it to 42E, and 30W, to see if you have improved the tracking, you keep doing this until you have the best signal possible.
There are several lists, from other enthusiasts, for the strongest transponders, on various satellites, for the UK.
Here's one from William 1, a well respected satellite enthusiast, that you might find useful:
Strongest TV Transponders Dec 23rd 2014
104cm Gibertini dish + Inverto 0.2 Black Ultra as received in the East of England,
This guide is for setting up either a fixed or Motorised dish system for all active satellites 47.5 east to 45 west
DVB-S unless stated, $ = encrypted
Intelsat-10 @ 47.5 east 11501 H 3750 S2 Stan Sports $
AzerSpace-1 @ 46 east 10974 V 30000 MIR tv
Intelsat-12 @ 45 east 11523 V 5787 Prima tv
TurkSat 3A @ 42 east 11472 H 23450 GDS TV
Hellas Sat-2 @ 39 east 12524 H 30000 The Voice
Eutelsat 36B @ 36 east 12521 H 4340 Lider tv
Eutelsat 33B @ 33.2 east 12722 V 16728 S2 Polsat Sport $
Astra 5B @ 31.5 east 11933 V 30000 Pro tv Int
Eutelsat 31A @ 30.8 east 11637 H 2222 Turksat Tanitim
Eutelsat 28A @ 28.5 east 11260 V 27500 Africa Channel
Astra 2F @ 28.2 east 10964 H 22000 Channel 5
Badr-4 @ 26 east 12130 V 27500 Dubai Sports 1
Astra 3B @ 23.5 east 12168 V 27500 Ocko TV
Eutelsat 21B @ 21.5 east 11678 V 2850 Al Arabiya Al Hadath
Astra 1L @ 19.2 east 12226 H 27500 Euronews
Eutelsat 16A @ 16 east 11345 H 30000 S2 Carli tv
HotBird 13D @ 13 east 11137 H 27500 Bloomberg Europe
Eutelsat 10A @ 10 east 10756 V 2480 TV Zimbo
Eutelsat 9A @ 9 east 12054 H 27500 S2 Real Madrid tv
Eutelsat 7A @ 7 east 10721 H 22000 BBC Persian
Astra 4A @ 4.8 east 11766 H 27500 TET
Eutelsat 3B @ 3.1 east 11498 V 11852 Hispan TV
Thor-6 @ 0.8 west 12418 V 28000 Al Jazeera English
Intelsat 10-02 @ 1 west 12562 V 27500 Speranta TV
Amos-2 @ 4 west 10759 H 30000 News 24
Eutelsat 5WestA @ 5 west 11591 V 20000 France 2
Nilesat 102 @ 7 west 11938 V 27500 MBC Action
Eutelsat 7WestA @ 7.3 west 11430 V 27500 Palestine live
Eutelsat 8WestA @ 8 west 12533 H 5000 Mediasat feed $
Express AM44 @ 11 west 11565 H 8000 S2 Rete Capri
Eutelsat 12WestA @ 12.5 west 11407 V 27500 KTO
Telstar 12 @ 15 west 11032 V 2130 Kirkuk tv
Intelsat 901 @ 18 west 11606 H 12000 (Data Stream)
NSS-7 @ 20 west 12733 H 1500 DVB-S2 Nabaa TV
SES-4 @ 22 west 11128 H 14300 S2 Reuters tv
Intelsat 905 @ 24.5 west 11513 H 27500 TV Record
Intelsat 907 @ 27.5 west 11495 V 44100 S2 BBC News $
Hispasat 1E @ 30 west 12092 V 27500 Cubavision
Intelsat 903 @ 34.5 west 11028 V 5000 DVB-S2 (Data Stream)
Telstar 11N @ 37.5 west 11679 V 4090 DVB-S2 (Data Stream)
Intelsat 14 @ 45 west 11608 H 1852 RASD tv