Lacewing

An orange- brown lacewing, probably Nothochrysa capitata (Neuroptera: Chrysopidae).  The white blob on its abdomen might be pollen from a flower it has visited (more likely a spermatophore - see Graham Calow's comment below).

Photo taken in Whiteknights Park, Reading, UK, on 2014-07-06.

Comments

[Graham Calow]

The white blob as you describe it is a spermatophore - a package of sperm passed from the male to the female

http://www.naturespot.org.uk/species/nothochrysa-capitata

[Tristram Brelstaff]

Yes that does make more sense. Thank you.