From the website of the IAM Jet Centre it would appear so. FIRST can use the lounge and get driven the the plane on departures, and if you book Sussex Suite at LGW you get it on arrivals too. Great perk! Also at Grenada now FWIW.

VIP Services

IAM Jet Centres in Barbados and Grenada provide special VIP services for discerning passengers travelling on some of the world's premium airlines including British Airways and Virgin Atlantic Airways. Our guests enjoy a unique private jet experience including our luxurious lounges and meeting spaces as well as in house Immigration, Customs and security screening. An exclusive and stress-free escape from the noise and bustle of busy airport terminals.

Our Barbados facility has been providing these special services exclusively to British Airways for more than 10 years, while our newest jet centre in Grenada welcomes guests travelling on British Airways, Virgin Atlantic, American Airlines and other leading airline brands with our elegant St. George's Suite service.

These bespoke services are centred around our 25 years of experience hosting private and executive jet passengers... offering a remarkable beginning and conclusion to your island visit.

DEPARTURES

Enjoy private check in at our reception desk while your luggage is tagged for departure. Our certified in house passenger screening is state of the art yet comfortably done.

Passengers travelling in the First cabin are eligible for Trident Suite departure service with the compliments of British Airways. Reservations for other premium passengers can be made up to one day prior to your flight based on availability.