Prior to the agreement with UEFA, the competition was not considered worthy of the larger clubs' attention. However, once a position in Europe was on offer, as was a final at Wembley Stadium, the competition's standing was improved and in the 1968–69 season only Manchester United declined to participate. Everton chose not to compete in 1970–71 so that they could concentrate their efforts on the European Cup. Entry was made compulsory for all Football League teams the following year.
prior to the agreement with uefa the competition was not considered worthy of the larger clubs' attention however once a position in europe was on offer as was a final at wembley stadium the competition's standing was improved and in the 1968–69 season only manchester united declined to participate everton chose not to compete in 1970–71 so that they could concentrate their efforts on the european cup entry was made compulsory for all football league teams the following year