I have now installed the new gas hoses and would make the following observations
Ensure that you use a restraining spanner on the two elbows where the hose connections are made. There are flats provided on the elbows for this purpose and you risk breaking the elbows if you do not use a spanner as the union nuts are screwed on very tightly.
I found it easier to move the Oven in order to get to the elbow behind it. It is not a difficult job and makes access to the elbow much easier. I only moved the oven about 6 inches (15cm) away from the hull
Please note that the union nut screwed onto the cylinder regulator is a left hand thread. The three other unions are normal right hand threads.
Always ensure that you apply soapy water to all the remade connections in order to check for leaks.