You can here a demo of these sound effects here: https://www.youtube.com/watch?v=5_uHTZbtgDI&t=2s
A collection of British level crossing sound effects that can be used with the ATLS equipment. Simply place the sound of choice in the railroad crossing you want to edit, rename the .wav file as 'ukclbell' or 'ukwarble,' and commit. There are 27 sounds to choose from with possibly more on the way.