The reason for the postponement is that Ospreys are unable to supply suitably experienced front row players in their match squad as is required under the Magners League rules and IRB rules.

This rule was introduced for health and safety reasons and Celtic Rugby could not sanction a match in these circumstances.

Celtic Rugby recognises the great inconvenience this will have on Ulster and their supporters as well as Celtic Rugby's commercial partners, particularly BBC Wales who were due to broadcast the match live.

Until Celtic Rugby has had the opportunity to review the matter there will be no further comment.