I finally got round to changing the fuel hose under the car. I had been putting it off because the idea of lying under the car while petrol dripped down my arm wasn't awfully appealing. However, the job was much easier than I thought.
My method was to run the tank down as far as I dared. Then I parked on a slight downward slope and disconnected the fuel hose under the bonnet before the fuel pump. I quickly pushed on the uncut length of hose supplied by the Club Shop, and fed the other end into a fuel can. This enabled me to drain the fuel out, and I left the fuel in the can so any debris could settle out. I had to pour some of the fuel into my 'modern' but left enough in the can to refill the tank to get me to the nearest fuel station.
Then I temporarily reconnected the old fuel hose under the bonnet, moved the car to level ground, jacked up the rear and removed the wheel. I put my axle stand under the car and pulled off the old fuel hose. Only a small amount of petrol drained out, so changing the hose was really easy. I did fit jubilee clips rather than relying on a push fit.
I recommend you do this job outside if you can, just in case you spill any fuel and need good ventilation.