Commission Regulation (EC) No 455/95 of 28 February 1995 amending Regulation (EEC) No 1547/87 and (EEC) No 1589/87 as regards the buying-in of butter by the intervention agencies and Regulations (EEC) No 2191/81 and (EEC) No 570/88 as regards the grant of aid for the purchase and sale of butter at a reduced price to certain categories of consumers and industries