Trading update for 11 months to end November
Prior to COVID-19 we were reaching a pivotal point in Civil Aerospace. Following a period of rapid growth and new engine programme launches, R&D investment demands were falling and returns improving as we began to benefit from our large and growing installed base and reduced losses on new installed engines. The benefits from this have been delayed due to COVID-19, but the fundamental drivers of having a more efficient business with stronger margins and better returns remain intact and position us well for the eventual rebound.
In the 11-month period to end November, large engine LTSA invoiced flying hours (EFH) were approximately 42% of their prior year level. EFH have gradually improved since the trough in April although more recently the pace of recovery has slowed due to the second wave of infections in some geographies. In October and November combined, EFH increased to approximately 33% compared to 2019. In Q3 our EFH were 29% of the prior year, an improvement versus the 24% seen in Q2. We have reduced the pace of production for our large engines and our full-year guidance for approximately 250 deliveries is unchanged.
Business aviation has continued to see less of an impact than scheduled commercial flights with flying hours holding up relatively well, despite border restrictions being in place in many parts of the world.
Our Defence business has remained resilient with good cash conversion. We have a strong order book and 2021 forecast sales are well covered. In recent months we have secured orders for 56 new EJ200 engines for the German Air Force and reached an agreement to provide in-service support for the T-55 engine, should it be selected as the future heavy transport helicopter of the German Bundeswehr. We continue to focus on key growth opportunities for our core products in the US and the UK. The recently announced multi-year Defence budget increase in the UK will provide additional investment for next generation capabilities, such as the Future Combat Air System where we are a core partner in the growing Tempest programme. In addition, we are innovating in adjacent products and growing our aftermarket revenues from our large installed base.
Power Systems has experienced a significant fall in demand in most non-governmental end markets this year. The activity declines seen in the second quarter caused by the pandemic continued into the second half of the year, except in China where economic activity has recovered more quickly and we have continued to grow our market share. In recent months, we have seen some early indications of order intake levels picking up and year-to-date our net book:bill ratio has been approximately 1x. In November, at the China International Import Expo, we announced provisional agreements with six Chinese companies for almost 1,000 MTU engines and systems.
Our Small Modular Reactor (SMR) consortium has signed strategic agreements with Exelon Generation and CEZ and the UK Government has committed £215m for a four-year development plan for SMRs. This highlights the appeal and opportunities of our nuclear energy solution to support the decarbonisation of power generation in the UK and abroad.
In line with the challenging Civil Aerospace market trends, ITP Aero has seen a continued negative impact on trading. Defence, which represents 25% of ITP Aero volumes, benefited from the Eurofighter order from the German Airforce for 56 EJ200 engines.