Lenticular clouds, February 2018, Nice, France 

Stratocumulus clouds, 24 September 2020, Edinburgh Castle

Altocumulus clouds, 12 May 2022, Singapore's east coast,

Not sure - never saw a vertical hole in a cloud system, 29 December 2021, Old Mann of Storr

Stratus Clouds, 7 July 2020, Calton Hill, Edinburgh

No idea, 26 December 2021, Glencoe hills, Scotland

Stratocumulus clouds, 28 December 2021, Isle of Skye 

Altocumulus clouds, 26 May 2022, Singapore's east coast

Cumulus Clouds, 20 June 2020, Arthur's Seat, Edinburgh

Mammatus Clouds, February 2018, Grenoble, France  (pic credits: Olga Marchenko-Antokhina)

Kelvin Helmholtz instability, 01 September 2019, Noida India

Fallstreak cloud, 11 July 2020, Northeastern Edinburgh

Gravity waves, 12 June 2020, Edinburgh

Cumulonimbus Clouds, 24 September 2020, Edinburgh Castle

Stratus Clouds, 7 July 2020, Edinburgh

Cap Cloud, 28 December 2021, Isle of Skye

Cirrus 'Hook' Clouds, 29 June 2021, Fort Williams

Cumulonimbus, 15 October 2021, Check Java Wetlands, Singapore

Mackerel Sky, 17 October 2022, Singapore

Stratocumulus, May 2023, Riau Islands

Cumulus Clouds, June 2020, Edinburgh

Altocumulus Clouds, Singapore

Somewhere on this planet, Sunrise or Sunset

Gravity Waves Clouds, 14 December 2024, London