Starting at the top of your post,I would say the following:- Richborough Castle Kent TR3260 07.10.2013 (2) looks odd for colour and the legs, but I think is probably the harvestman Paroligolophus agrestis.
The next four down are all Pisaura mirabilis, a variable spider in terms of colour and depth of pattern.
The next two are the harvestman Paroligolophus agrestis and the last two a male of the harvestman Leiobunum rotundum.
You have also uploaded more photos, Richborough Castle Kent TR3260 07.10.2013 (1) is Metellina female, probably segmentata, but you need a microscope to be sure.
Minster Marshes Kent TR3063 30.09.2013 is Pisuara mirabilis again.
Minster Marshes Kent TR3063 29.09.2013 (2) and Minster Marshes Kent TR3063 29.09.2013 (1) is a female Leiobunum. You need to be able to clearly see the eye banding.
Minster Marshes Kent TR3063 24.09.2013 is probably Mitopus morio.
Minster Marshes Kent TR3063 23.09.2013 is Araneus diadematus.
Minnis Bay Kent TR2668 21.09.2013 is Metellina species.
Manston Kent TR3166 20.09.2013 is probably Mitopus morio.
Pegwell Bay Kent TR3564 18.09.2013 is Araneus diadematus.
Highstead Sand Pit Kent TR2166 12.09.2013 (1) and (2) are an Araniella species, probably either cucurbitina or opisthographa, but adults under a microscope are essential for species id.
Highstead Sand Pit Kent TR2166 12.09.2013 is Tetragnatha species, adults under a microscope necessary for species id.
Chislet Park Kent TR2163 30.08.2013 is Larinioides cornutus.