Right after the new patch I have made some of my own layouts (Blackwood less chicane) I can load it single player but Im not sure how to add it to my server, any thoughts?

If you are logged in as an admin, which you should be if it's your server, press shift+u, and on the bottom right of your screen click 'load layout', then select the one you want, and it should load. This needs to be done on the proper track of the layout and needs to be done in-game(when your driving on the track, not at the start screen).

Alternatively you can load the layouts actually physically onto the server and type /axload <layoutname>

Cheers thats got it working