Nesting? Fulmars

Nesting? Fulmars

Observation - Nesting? Fulmars - UK and Ireland. Description: Last year. This pair were sat tight on bare (as far as I could tell)rock about 10m up a 30m cliff. Could they be nesting/sitting on eggs?

Last year.
This pair were sat tight on bare (as far as I could tell)rock about 10m up a 30m cliff. Could they be nesting/sitting on eggs?