Is anybody still listening to the marker beacons these days!

We would continue for quite a lot of relatively significant failures below V1. Consequently most airline pilots consider V1 to have a variable value from 100 knots up to the actual calculated V1 figure for different failures. For example if a tyre burst at V1 minus 20 knots then depending on any other factors we would probably continue the take off.

Barking up the wrong tree here. The APU does nothing for thrust production. It is present for 2 purposes: electrical power generation and bleed air supply (air conditioning and engine starting) and consequently is not normally used in flight.
If there is a minuscule amount of thrust from the jet eflux then that is probably cancelled out by the drag from the air inlet.

A380 is definitely shorter than an A346 and I would guess is probably shorter than a 744 as well.

The call should come from whoever is the flying pilot for that sector and may be restated by the other pilot depending on company SOP rather than it being a Captain/FO thing.
We sometimes get a problem with SRS on take offs at low weight using TOGA power on the A346 as the SRS also limits pitch angle to 15 degrees nose up which can put you close to flap speed exceedances if not dealt with swiftly. We don’t usually suffer excess thrust problems on the 300! 😀

Operating in Africa (South Africa excluded) teaches you one thing very quickly… you are totally on your own. The key rule is not to trust anyone. Anyone remember the Hydro Air cargo 747 that crashed in Lagos after landing on a closed for maintenance runway? The controller cleared him to land and turned the runway and approach lights on for a runway covered in construction vehicles. A couple of years ago I was the first arrival into Lagos early one morning. We asked the tower for the weather and they said it was lovely weather. We went down to 200′ and had to go around due to no visual contact with thunderstorms all around and when we called them to notify them that we were going around all they wanted was for us to give them a weather report! Nairobi is not quite as bad as Lagos but it has a whole bag of other issues such as specific routes to fly on arrival and departure to avoid getting shot at by the natives!

IIRC G-BODY and G-SOUL are/were Cessna 310’s belonging to Air Atlantique (or some form of that company) so I guess the mind, body and soul logic would mean that this belongs to them as well. I’m sure there’s someone keen enough to bother looking up on G-INFO.