Regarding fleet age of LH:
The high age resuts from the 737s almost solely through these…and replacement is ordered in form of A320s and 320neos.
The longhaul fleet is rather new, the 747-400 are phased out by new 747-8 and A380, 10 are in operation.
Delays with the A380? seems for BA only….lol. There are 100+ in operation, just BA behaves likes doing a virginal tryout…ridiculous.