Newcomers are restricted to horses not to have won more than £300. I think Members Cup is an open class. You don't see much of these anymore as they tend to say 1.10 Open or 1.10 Amateur
I think the Members cup is a qualifier for the Scope festival but I could be totally wrong because I thought that had winnings limit on it and was normally run alongside Newcommers
There is no such thing as a Members cup 1.10 anymore. They used to be and if you jumped 4 Double clears you qualified for the Festival. It was an open, but there might have been a restriction on the rider. What you have now is the Smarterbuilder 1.15 class, which is an open and if you come in the top 4 you qualify for scope. Its the smallest open class you can do up there and the final is very quick.