There were several of these seen, all quite nervous, so difficult to catch a sharp image.
No interactions present.
according to Harvey, Nellist & Telfer (2002) Tetragnatha montana is the commonest species in southern Britain.
BMIG website: www.bmig.org.uk (centipedes, millipedes & woodlice)
BMIG Newsletters ~ www.bmig.org.uk/view/resource/bmig-newsletter
BMIG Bulletins ~ www.bmig.org.uk/view/resource/bmig-bulletin
at genus level, then?
Lat/Lng: 52.4515, -0.1889
OS grid ref: TL231852