It looks like there were about 15 but all are now de-registered/exported. From
https://www.caa.co.uk/aircraft-regis...earch-g-info/# advanced search for type CL600-2C & 2D including de-registered aircraft.
Serial no.: 10028 Aircraft type: CANADAIR CL600-2C10
Serial no.: 10029 Aircraft type: CANADAIR CL600-2C10
Serial no.: 10039 Aircraft type: CANADAIR CL600-2C10
Serial no.: 10048 Aircraft type: CANADAIR CL600-2C10
Serial no.: 10052 Aircraft type: CANADAIR CL600-2C10
Serial no.: 10052 Aircraft type: CANADAIR CL600-2C10
Serial no.: 10048 Aircraft type: CANADAIR CL600-2C10
Serial no.: 10039 Aircraft type: CANADAIR CL600-2C10
Serial no.: 10029 Aircraft type: CANADAIR CL600-2C10
Serial no.: 10028 Aircraft type: CANADAIR CL600-2C10
Serial no.: 15221 Aircraft type: CANADAIR CL600-2D24
Serial no.: 15237 Aircraft type: CANADAIR CL600-2D24
Serial no.: 15242 Aircraft type: CANADAIR CL600-2D24
Serial no.: 15284 Aircraft type: CANADAIR CL600-2D24
Serial no.: 15283 Aircraft type: CANADAIR CL600-2D24