This survey work was undertaken by Heriot-Watt University over the winter of 2014/15, chiefly in the form of an undergraduate dissertation. The work aimed to assess the extent and possible cause of reef damage. The video data collected in this 2014 survey was analysed in 2019 under contract from NatureScot (SNH) to assess development of the serpulid reef feature of Loch Creran over time following a repeat site condition monitoring survey of the biogenic sub-features of the loch carried out between 2017-2018 in order to identify any deterioration in the condition of the features and to form a judgement on their current condition.