The +8 of the late 90s and early 2000s can be slow to fill but there are a couple of things you can do to alleviate the situation.
1 As above use the filler hose at the 12 o'clock position rather than 6 o'clock
2 Take off the panel behind the spare wheel to expose the hose from the filler cap to the tank. You will see that it goes through pretty sharp bends as it transits from the cap on the drivers side , to the tank on the passengers side. Make sure that this hose is not kinked anywhere. Release the jubilee clips and try to get the hose to "line up" in a way that eases the flow. Be careful you don't precipitate another problem by kinking the overflow hose by doing these mods.
While you are there have a very good look at that hose , it can and does perish, as I can testify, quite an expensive part (approx £50 from my poor memory) but better replaced than a fuel seepage and
3 If all the above does not give sufficient improvement take the fuel filler cap off the car's back panel (after first releasing the jubilee clip holding it to the hose) , and very carefully drill another hole (or two) in the secondary cap (where the cut off plate is located) near the existing one. This will aid venting. However if you are in any doubt about where to drill , please take it to a Morgan dealer or below enthusiast who does and enlist their help. It goes without saying that you MUST do this off the car , the last thing you want is metal swarf in the tank. Also make sure that the cap is thoroughly cleaned before refitting, you must get rid of ALL the metal filings. i will try to take a picture of mine at some later date (bit dark in the garage to get a good image)
Last edited by MOG 615; 28/03/20 09:36 AM. Reason: afterthought