Mon 2013-08-26 
Prosena siberita (Diptera: Tachinidae), a Tachinid fly with a long proboscis.
Its larvae parasitize scarab beetles.
After taking the above photos I trapped the fly, took it back home and took the several more photos, including the following one, before releasing it again.
First two photos taken in the Wilderness, Whiteknights Park, Reading, UK on 2013-08-25.
Sun 2013-08-25 
A female Musca autumnalis (Diptera: Muscidae). See here for a male.
Photos taken in Whiteknights Park, Reading, UK, on 2013-08-18
Sat 2013-08-24 
A small Tachinid fly, probably a Siphona sp (Diptera: Tachinidae), feeding on common fleabane (Pulicaria dysenterica).
Photos taken in Whiteknights Park, Reading, UK, on 2013-08-18.
Fri 2013-08-23 
Ganoderma applanatum growing at the base of an oak tree (Quercus sp). The brown dusting is its spores.
Photo taken in Whiteknights Park, Reading, UK, on 2013-08-18.
Thu 2013-08-22 
A male Scaeva pyrastri (Diptera: Syrphidae).
Photo taken in Whiteknights Park, Reading, UK, on 2013-08-18.
