UK-Lerwick: operation of scheduled air services — Invitation to tender issued by the United Kingdom under Article 4(1)(d) of Council Regulation (EEC) No 2408/92 in respect of the operation of scheduled air services between the Shetland Mainland (Tingwall/Sumburgh) and the islands of Foula, Fair Isle, Out Skerries and Papa Stour Text with EEA relevance