The EU has unveiled proposals to keep the UK in the 28-member bloc. Tough negotiations remain for EU member states to agree on four major areas of reform.

The EU has delivered a set of proposals that meet many of the UK’s demands but tough negotiations remain to avoid a “Brexit” from the 28-member bloc, British Prime Minister David Cameron said on Tuesday after European Council President Donald Tusk unveiled a “basket” of reform proposals.

“Draft EU renegotiation document shows real progress in all four areas where UK needs change but there’s more work to do,” Cameron said on Twitter.