Original sentence: It is a tabular islet with vertical faces about 160ft high, and is adjacent to Noss, from which it is separated by a 20m gap Both the Holm of Noss, and the adjacent Faedda Ness on Noss are riddled with caves
Edited sentence: It is a tabular islet with vertical faces about  high, and is adjacent to Noss, from which it is separated by a 20m gap Both the Holm of Noss, and the adjacent Faedda Ness on Noss are riddled with caves