Mint Never Hinged (MNH) postage stamp sheet as per title and scan below. Issued by Gibraltar on 31st May 2018 to commemorate the 100th Anniversary of the RAF.

UK 1st Class P&P is £1.35.
Airmail (Europe) is £1.85.
Airmail (Outside Europe) is £2.55.
Any additional individual stamps purchased at the same time are POST FREE (Please use the Shopping Basket on eBay.co.uk for Postage Discounts PLUS Extra Discounts).