Add Cornish Honey into a tumbler, then add lime juice and rum.
Mix with a barspoon until partially dissolved then top up with a little water and some ice.
Shake without ice first for 15 seconds to help emulsify the egg (this is known as a dry shake), then add ice and shake again until you see frost on the shaker.
Strain into a cocktail glass.
Fill a Highball glass with cracked ice, add the rum and lime juice then top up with tonic water and give it a gentle stir.