Fastest lap of the race

Hi guys

Forgive me for this if it’s obvious but I’m very new to all ths... and I’m having fun!

i am personalising a dash and want to show fastest lap of the session by anyone plus the delta of my best lap to this fastest lap. 

I have used session best lap but that only shows my best and doesn’t include anyone else in the race. 

thanks in advance for any help. 

cheers