This ignores the reality of the situation:
- Chengdu was tried by BA and failed.
- Airlines seem to get slots when they want them. For example Jet got new slots recently, as did JAL.
1. So because BA "failed", more flights to Heathrow from China aren't important? Chengdu is one city - there are plenty more in China, many of which have links to other European
Capitals but not London. The only other European airline to fly to Chengdu is KLM which had already long been established when BA arrived. Paris and Frankfurt are both served by Air China - I'd wager if Air China had flown the route it would have been more successful as it was already a well known brand in Chengdu as well as in London from its flights to Beijing.
2. Airlines sell and trade Heathrow slots between each other, often between close partners or other airlines within their alliance, and often to airlines that already have slots at Heathrow. For airlines new to Heathrow it is all but impossible for them to get slots. I seem to recall Vietnam Airlines was the first airline to gain slots at Heathrow in something like 10 years.
Whilst congratulations are due to Manchester for achieving a very successful route to Beijing, and whilst other routes to China (e.g. Shanghai & Guangzhou) should be encouraged, it is highly unlikely that Manchester will be able to get links to
new Chinese markets. By that I mean markets such as Beijing, Shanghai & Guangzhou are already well established in Europe.
How many passengers from MAN's catchment use LHR to travel to China (& Asia in general)? With the MEB3, Singapore, Cathay and Hainan operating direct from MAN I'd guess relatively few. As such any new route from MAN to China will a). likely be successful and b). not greatly affect the demand for routes to China/Asia from Heathrow.