Schemes by PLP and Ian Simpson’s practice head up a six-strong shortlist for this year’s Carbuncle Cup.

The competition, run by Building’s sister title BD, was launched in 2006 and is awarded to the “ugliest building in the UK completed in the last 12 months”.

Previous winners of architecture’s wooden spoon have included Media City at Salford by a number of architects including Wilkinson Eyre and Chapman Taylor, Grimshaw’s Cutty Sark renovation and Rafael Vinoly’s Walkie Talkie building.

PLP’s entry is for the Nova mixed-use scheme in London’s Victoria which has been masterminded by developer Landsec while Simpson’s practice, Simpson Haugh, is behind a 17-storey mixed-use development at Battersea Power Station called Circus West. Longer than the Shard when laid on its side, the scheme includes 800 apartments.

Others to make it on to the shortlist include an extension to a private house in Malvern, Worcestershire, and a new entrance to Preston railway station.

The winner will be announced next Wednesday. Judges include Catherine Croft, director of heritage group the Twentieth Century Society, and planner and urbanist David Rudlin, whose firm Urbed won the 2014 Wolfson Prize.