Thanks! Strange that from AMS, the cheapest class mentioned is T - no G/N/Q/U?? Although I guess that they will expect most people to fly the direct route if leaving from AMS? Also, note that we are all most welcome to waste our 9000 odd euros in P but just bear in mind there is no P on the aircraft that flies the route!

Fares from CDG are actually even higher. Sample dates in July all excluding taxes:

Economy from €719 (Q) to €5041 (yes!!) in the highest Y
Premium economy from €1743 (A) to €4653 (highest W)
Business from €2952 (Z) to 7246 (J)

From LHR:

Economy: €333 (T)-€3205
Premium eco: ?
Business: €1834 (Z) - €5407 (J)

From FCO:

Economy: €548 (T) - €3320 (Y)
Premium eco: €929 (A)- €3620 (W)
Business: €2519 (Z) - €5826 (J)

From FRA:

Economy: €509 (T) - €3602 (Y)
Premium eco: €1483 (A) - €4203 (J)
Business: €2372 (Z) - €6706 (J)

Note: all origins feature a fare in P but I didn't include it for the reason mentioned above.