Why Leeds Bradford Airport must count ALL night flights

Leeds Bradford Airport has breached the night time flying limit for the last two summers. It is now trying to claim it does not need to count some types of plane towards its allowance because they were not specifically mentioned in the conditions that were written 30 years ago. Its argument is convoluted, relies on cherry picking which version of the national guidelines is relevant and is a huge stretch of the imagination.

In a nutshell…

Planes are certified with a QC value which specifies which noise band it belongs to. QC 1 is noisier than QC 0.5 ,which is noisier than QC 0.25 and so on.

For more information on how aircraft noise is measured, please see How Aviation Noise is Measured.

When the current operating conditions were agreed between the council and the airport in 1993, the category of QC 0.25 did not exist, and, the airport says, therefore, that those planes do not count to the night time flight allowance.

Condition 6

The relevant condition is condition 6, here it is:

Condition 6 – During the night-time period, (2300-0700), no aircraft movements shall take place other than by:-
a. Landings by aircraft classified as falling within Quota Count 0.5 and 1 for arrivals as defined in UK NOTAM S45/1993 issued by the Civil Aviation Authority and any succeeding regulations or amendments/ additions/deletions.
b. Departures by aircraft classified as falling within Quota Count 0.5 for departures as defined in UK NOTAM S45/1993 issued by the Civil Aviation Authority and any succeeding regulations or amendments/ additions/deletions.

The airport’s claim is that planes certified as QC 0.25 don’t “fall within” QC 0.5 and therefore are not allowed to fly because the condition says no other planes may fly. The airport wants the planes to be not allowed to fly in order for its CLEUD application to work. If it can prove that those planes have been in use unlawfully for years (despite saying the opposite for all of those years) it can apply for immunity from enforcement. This also means that the planes would not count towards the night time flight allowance.

But if you compare the DfT definitions of QC bands in 1993 vs 2007 onwards, you can see that in 1993, QC 0.5 included anything below 90 dB down to 0 dB. And later, when QC 0.25 and QC 0.125 were introduced, the DfT simply subdivided QC 0.5 into smaller bands. So, 84 to 86.9 dB (what is now QC 0.25) was clearly “within” QC 0.5 in 1993.

Noise Bands 1993 QC 1993 Noise Bands 2007 onwards QC 2007 onwards
Exempt 0 Exempt
Less than 90 EPNdB 0.5 Below 81 EPNdB 0
81 – 83.9 EPNdB 0.125
84 – 86.9 EPNdB 0.25
87 – 89.9 EPNdB 0.5
90 – 92.9 EPNdB 1 90 – 92.9 EPNdB 1
93 – 95.9 EPNdB 2 93 – 95.9 EPNdB 2
96 – 98.9 EPNdB 4 96 – 98.9 EPNdB 4
99 – 101.9 EPNdB 8 99 – 101.9 EPNdB 8
Greater than 101.9 EPNdB 16 Greater than 101.9 EPNdB 16

 

The correct reading of condition 6 says that ALL planes are allowed to fly and must count towards the night time flight allowance (apart from Exempt).

So, because QC 0.25 planes are allowed to fly by condition 6, then they must count towards the night time flight allowance as do all other flights defined in condition 6. And this means that no breach has occurred, therefore the CLEUD is invalid because the flights have always been lawful. See Certificates of Lawful Existing Use or Development (CLEUDs).

The airport could also make two big problems for itself by pursuing this crooked argument, because if the council accepts that QC 0.25 can’t fly, then QC 0.125 also cannot fly. This category is widely in use today, especially with the smaller passenger and private charter jets.

The second problem arises from a current consultation by the DfT about night flight restrictions which proposes to rebase the QC system so that the noisiest aircraft are moved into the categories QC8 and QC16, and current QC0.125, QC0.25, QC0.5 are to be moved to QC1 to QC4, with the possibility of future proofing the system by creating QC categories for aircraft that do not yet exist. https://www.gov.uk/government/consultations/night-flight-restrictions-at-heathrow-gatwick-and-stansted-airports-between-2022-and-2024-plus-future-night-flight-policy/night-flight-restrictions,

Consequently, there is likely to be a time in the near future where the current QC labels will change again and Leeds Bradford Airport will end up in a position where it cannot fly any planes at all, given its attempt to reinterpret its current conditions in such an extremely inflexible and pedantic way, because QC 0.125 to QC 0.5 will no longer exist. Caveat emptor.

Leeds Bradford Airport is big enough already