The Hong Kong government has further reduced the fuel surcharges it allows in its jurisdiction:
http://www.cad.gov.hk/english/fuel_surcharge.htm
The new rate approved from 01MAY15 to 31MAY14 is HKD 205 each way, for a total of USD 52.90 for a round trip HKD-LHR.
Compare with the fuel surcharge for the same flights in business class when purchased in LHR (which is the amount BA would charge Hong Kongers absent government regulation): GBP
490.20 329.00, or an astounding USD 490.20!