A further 2 will be received on 17 April and another 4 by Mid-May.Whilst these Epishuttles are being tested SAS is working with the RAF who are currently providing cover for transfers off of the islands, using two puma helicopters based at Lossiemouth which can transfer patients without Epishuttles.Where a military fixed wing aircraft or helicopter is requested, before Epishuttles are available, SAS will be able to deploy their expert retrieval team timeously to support Island colleagues prepare the patient for transfer and undertake the retrieval, meaning they will be on site ahead of the military air asset and have the patient ready for transfer when it arrives.Working with Loganair, who are providing two additional twin otter aircraft, one of which will be operational from Friday 3 April and the other within the next 14 days.