That's great

Thank you for sharing your solution!

Ciarán

Thanks Ciaran,
I have fixed it by changing wrapper height and padding in my template Custom CSS.

#container_hornav .wrapper960 {
height: 62px;

}

#hornav > ul > li > a {
padding: 17px 20px;
}
Increased the height to 62 px and increased padding to 17px. This moved sub-menu closer to the parent menu item so there is no more gap between them.

Hello

Would you have a URL to an example of this issue?

Ciarán