It's no good - I'm well and truly stuck again. Since I've answered so many of my own questions in this thread, here's an updated list of the filming locations I still need help with...
~ The background onto which they pasted the
conveyor belt entrance in Series 4. (Could be somewhere that's already listed with a blue marker on the
map.)
~ The Level 2 "blue room" in Series 4 that was home to
Doorkis and also used for
character encounters. Again, this could be inside one of the locations we already know about.
~ The
Level 3 room where Elita wanted a ruby from Sarah, subsequently used as
Hordriss' headquarters in Series 6. There's an Eyeshield sequence heading up the spiral staircase as Sarah leaves the room.
~ The wall used to create an area for the
Level 1 Blocker in Series 5.
~ The walls and windows used to create a
Level 1 Causeway in Series 5.
~ The
Dunswater as seen in Series 5 and 6, with
boat rides ending at a
small jetty, followed by an Eyeshield sequence across a sort of park.
~ Various scenes and Eyeshield sequences in the Greenwood of Series 5. Could have been filmed at the Weald and Downland Open Air Museum, or somewhere else entirely.
~ Smirkenorff's coast flight during the end credits of Series 5 episode 3. He flies over a very distinctively shaped headland which should be easy to recognise, but so far I haven't been able to locate it.
~ The
Level 3 clue room in Series 6, with tiled floor and open to the sky. The Eyeshield sequence leaving this room is shown in full during Ben's quest.
~ The
Level 2 courtyard used for spying and character encounters in Series 6 and 7. The paving isn't real (it's been copied from the Level 3 clue room) so it might be grass or something in reality.
~ The
Level 2 courtyard where Matt met Heggatty and which was normally
seen in reverse with Peggatty hurling fireballs.
~ The timber-framed
Level 1 room seen twice in Series 6, once as a clue room.
~ Captain Nemanor's ship, the Cloudwalker, seen from
various angles. A couple of dungeoneers went
below deck and there was an Eyeshield sequence walking towards a hatch with a cross over it (seen in full during Ben's quest).
~ The path travelled by January and Ben in Series 6, overhung by a
distinctive tree branch.
~ Smirkenorff's flight along another rocky coastline during the end credits of Series 6 episode 2.
~ Smirkenorff's flight over something resembling a salt marsh during the end credits of Series 6 episode 3.
~ The (presumably Spanish) castle in Series 7 where a troll could be found
swinging its club across the path.
~ The presumably Spanish location used as the
tavern where Lissard was pretending to be Marta during Barry's quest.
~ Various areas of Grimdale in Series 7, which may or may not have been filmed in Spain:
this building,
this building,
this structure and
Rothberry's stall.
Please let me know if you can identify any of these locations! Thank you!