An alliance of trade bodies has said in an open letter that there was some welcome clarity detailed in the proposals. However, they said in a joint statement that there was ongoing uncertainty about other critical issues that could impact how systems are provided. Supply fearsThe open letter to European authorities also warned that the proposed plans to introduce stricter phasedowns posed a risk of refrigerant shortages in the region. It cited concerns about insufficient additional quota being allowed on the market in time to ensure industry can support the postponement of some equipment bans. The signatories of the letter said they had had now shared their concerns about the F-Gas reform proposals ahead of the ‘trilogues’ negotiations starting between European authorities.