Thanks fhills, but I'm not worthy of the compliment.
The bike is about 9 years old, and I have never had a problem with it. The SRAM Dual drive hub gives a fantastic range of gears with an 11-28 + 7 speed cassette. The bike is as comfortable commuting in London, pottering about on a towpath or climbing a Spanish puerto.
On this trip, I returned home via Swains Lane in Highgate with two heavy panniers and a bar bag and stole the KOM on Strava!
(That's a terrible lie, for which I apologise
)