Upton Fen
Lacehopper Sp?
Very much like to find some more of these.
Forewings with brown marking at the base. Although not fully in focus it does have
a dark transverse band across the wings.
and
The commonest one is
Common Lacehopper (Cixius nervosus)
Grammoptera ruficornis
Sillis ruficollis
Males large comb like antennae and the sharp hind angles on the pronotum
Popar Leaf Beetle Larvae 
Shedding skin priot tp pupating?
Poplar Leaf Beetle (Chrysomela populi) Feeds on Willow and of course Poplar
from
UK Beetles
anthropodafotos.de
Bog Pimpernel (Anagallis tenella)
Very Bronze Fly Sp?
Long-legged Fly Sp?
Long-winged Conehead ♂︎ Nymph (Conocephalus fuscus)
Caddis Fly
Glyphotaellus pellucidus ♂︎
Naturespot 
Smut on Carex riparia
Farysia theumenii
Dead mosquito
Broad Centurion (Chloromya formosa)
Large Marsh Horsefly (Tabalus autumnalis)
Migrant Field Syrph (Eupeodes corollae)
Conehead Sp?
Variable Damselfly ♂︎ (Coenagrion pulchellum)
Broad-barred Flexwing (Dasysyrphus venustus)
Long-legged Fly
Rhaphium crassipes
Yellow Dung Fly (Scathophaga stercoraria)
Daggerfly Sp?
Empis livida?
Eristalinus sepulchris
False Oat grass (Arrhenatherum elatius)
Fen Orchid (liparis loeselii)
Fly Sp?
Gall on Fen Bedstraw
From the
British Plant Gall Society
Possibly Geocrypta galii
from
Plant Parasites of Europe
But they neither source specifically mentions Fen Bedstraw as a host
Gallerina Sp?
Black-horned Gem (Microchrysa polita)
Green Emerald (Lestes sponsa)
Norfolk Hawker (Aeshna isoceles)
Helophilos hybridus ♀︎?
Is this the beginning of a Cigar Gall? Or…..?
Hoverfly Sp?
Neoscia Sp
Confirmed by Facebook Hoverfly group
Neoscia Sp?
Roger Morris from the Facebook Hoverlfy page
"Fairly sure that's Neoascia tenur"
The rather strange looking fly that causes the Cigar Galls in reeds.
Lipara lucens
Longhorn Beetle (Rutpela maculata)
Marsh Thistle (Cirsium palustre)
Marsh Violet / Bog Pansy) Viola palustris)
Moth Sp?
Moth case?
Spider Sp perhaps has brought the spikelets together
?
Phantom Cranefly (Ptichoptera albimama)
Picture Wing Fly Sp?
Mottled Thistle Fly (Xyphosia miliaria)
White Ragged Robin (Lychnis flos-cuculi)
Rove beetle Sp? & Spider Sp?
Rush Sp?
Wood Rush Sp?
Rush Sp?
?
Cephus nigrinus?
Sedge Sp?
Common Yellow Sedge (Carex demissa)?
Black-tailed Skimmer ♂︎ ( Orthetrum cancellatum)
Snail Killer Fly?
Pherbina coryleti
Chyrsopilus cristatus ♂︎
Soldier Fly Sp?
No soldier flies have the muscular hind legs or the head quite so obviously spherical on a stalk.
Also the angle of the photo doesn't show the humpback nature of the fly.
Dance Fly Sp? Hybotiae Sp?
Hybos culiciformis
Spider Sp?
Tooth-thighed Hoverfly (Tropidia scitta)
Lesser Water Parsnip (Berula erecta)
Sawfly Sp?
Tenthredopsis nassata
from
NatureSpot