Prob Black B Albatross off South Stack.

Not been mentioned yet but RSPB S Stack reporting on their facebook page from yesterday:

"Albatross flies past Ellin's Tower!
A member of staff saw an albatross flying past out to sea at midday today heading towards North Stack. This was possibly a black-browed albatross - one was seen flying past the Isle of Man yesterday. Although extremely rare, one has been seen from South Stack in the past".

Worth keeping an eye out if seawatching.  Hard to mistake but it would be good to clinch species.  Most likely BBA but you never know.  Hopefully it will fly past Bardsey, or better still Rhos Point!