AC - I agree with everything else in your post but this
If the wings are not level, or airspeed is rapidly dropping, use same as day VFR, a gentle turn with back pressure, let the nose come down, roll level
is almost certainly likely to result in further disorientation and a worsening of the UA.
Turning and acceleration errors are what cause the leans and often lead to the UA - get the wings level first, adjust the attitude to control the speed and add/subtract power as required.
WASP - as mentioned earlier by Letsby, is the standard recovery (with some small variations in terminology) for all 3 Brit Mil services.
All of the above needs to be done positively but gently since many pilots aggravate the UA by being too 'punchy' with their recovery technique.