Hello everyone! I made a similar drink working in London - behind the bar of course. I personally infuse a whole bottle of London Dry Gin (3 bags per litre) then 50ml in, 25ml lemon juice, 15 of rich syrup and I go heavy with the eggwhite (50ml). I called it Earl Grey Flip (even it has no egg yolk in there but sounded great to me!). Still in my drinklists since 2016, it’s been bestseller in Bistrotheque, London.