There is absolutely zero requirement for any 2036 trains to be identical to the “2010” Azurs. Alstom (and its progenitors and absorbed companies) have been making Métro Pneu for 70 years, and can supply a pneumatic train to match every spec required by our rollways, tunnel and load gauge, platform heights and any other dimensions. Even the silly wider triple doors can be matched, should we ever decide to go ahead with PSDs.