Got round to doing this today. Bit of a learning session for me as I've not done it before, so maybe my mistakes will help somebody - apologies to you experts if I am teaching you to suck eggs. Struggled to get the old filter off by twisting and turning it to the left, then after it finally came off found it is not attached by threads (as in a canister oil filter). The filter head is plastic and the filter fits by aligning 3 small pips and one wide pip, pushing firmly up until it clicks, then half a turn to the right to lock it in place. Removal is same but in reverse - half turn to the left and pull it off. Bit like changing a light bulb. I brimmed the new filter with fresh diesel before fitting. The seals are internal lip seals, so no need to oil them first as they get submerged in the diesel. Next was the priming. The low pressure fuel feed runs parallel to and level with the top of the rocker box and has a schraeder valve at the high point for attaching a vacuum pump for bleeding, so I fitted a schraeder valve screw-on (found in the garage) to the end of my new Draper Expert hand pump (£16 on ebay) with the intention of using it to prime. But when I took the cap off the fuel line fitting, I found the connection on the car to be different (larger thread size to the fitting I made up). So reverted to the spigot fitting on the hand pump, pulled the quick release fitting on the fuel feed line at the point where it turns 90 degrees and drops down to the fuel pump at the front of the engine. And found the spigot fitting on the hand pump was about 9.5mm diameter whereas the fuel line spigot is 10mm diameter. So I put a few turns of pvc insulating tape on the hand pump spigot, calliper checked it was now 10mm diameter and shoved it in the fuel line fitting. Got a reasonable seal and managed to pull about half a litre of fuel through the line. Got all of the big air bubbles out, but was still pulling fine bubbles (probably getting air past the pvc tape). Reconnected the fuel line, knowing there was still "some" air in there, but not very much. Started the engine, fired up straight away and left it ticking over while I tidied up. Engine running like a sewing machine, sweet as a nut.