However, there were challenges in maintaining contact with participants once they had left the service, so this may not reflect what has been achieved in practice.
Fodd bynnag, roedd heriau o ran cadw cyswllt gyda chyfranogwyr wedi iddynt adael y gwasanaeth, felly efallai nad yw hyn yn adlewyrchu’r hyn a gyflawnwyd yn ymarferol.