Velux drip between flashing and frame??

[23vc]

Hi
I've installed my own velux's with EDW flashing and mendip tiles, pitch is 17 ish.
After heavy rain yesterday, I found a single drop of water, on the velux frame, which had appeared to run down between the flashing upstand and the frame. No issues on the tiling and felting side, this is more like an issue with the flashing itself. When I throw half a bucket of water straight into the side flashing channel, it also comes through in the same place, like it's "overflowing" over the flashing upstand against the frame. I'm a bit baffled as cannot see how I've fitted the kit wrong, instructions are clear and I can't really see how you could get it wrong.
To be clear the issue is not water getting under my tiles, it's coming down the outside edge of the window frame. Any thoughts always appreciated!
pic attached of where the water's getting in ...........
Cheers
John

 

[Makie]

Are you able to take a picture of the window from the outside?

 

[23vc]

Pics attached - water's coming in where I've drawn the blue arrow - not under the tiles but between frame and flashing

 

[23vc]

Identified where it’s getting in, right in top corner (see pic), getting little beads of water when totally flooding the top corner with the hose. Baffled as to what I’ve done wrong unless I’m just soaking it too much.

 

[Makie]

The top right flashing looks like it is slightly raised - https://gyazo.com/adbe0500d4028d674e9161869e5a9763 - this may be letting water in

 

[23vc]

Thanks. yeah It’s definitely leaking on the right hand side. It’s coming in little drops down between the frame and the flashing, so it’s getting up and over somehow. Can’t figure it out so I’ll probably end up stripping it out and re doing (got 3 other windows and they’re all ok)