Now sold out.
Cheaper in a couple of places. Also been sub £10 previously (though I sold my time machine recently): https://boardgameprices.co.uk/item/show/646/aeroplanes-aviation-ascendant
Official 14+ guidance (probably to avoid being classified as a toy). User guidance on BGG is 12+
It's a Martin Wallace game so they are usually relatively involved. BGG weight of almost 3 so medium-heavy complexity.
From this play through it looks complex. https://www.dailymotion.com/video/xwxh3v