Off-topic - To me the question regarding pax seating in airliners has the wrong focus. There are no such restrictions/worries regarding seating on trains and buses, however the Govt have advised against use of public transport unless essential. The fact is, you can't realistically "solve" this problem on any form of public transport, including aircraft. If face masks are any use - still being argued over - then precautions such as wearing masks/gloves, health check prior to boarding, suspension of in-flight service etc would be the only way of mitigating this.
Back on-topic, I hope Loganair get the suppport they need, if they do need it. The Highlands & Islands rely on LM for pretty vital connections that are essential for healthcare, business and services.