Warner Music Group has expanded its relationship with singer/songwriter Phil Collins, inking a new worldwide recording deal that includes the U.K. and Ireland for the first time.Terms of Collins’ pact with Atlantic Records and Warner Music Intl. were not disclosed. However, Collins’ track record as one of the leading hitmakers of the 1980s is likely to make his potential revenue on the deal near the level of recent big Warner Music signees Prince and Madonna. Negotiated by Tony Smith, Collins’ U.K.-based manager, the deal lacks the multimedia ties previously added to the packages of Prince and Madonna. And while Collins has had as much solo recording success in the 1980s as any artist, his new record deal comes during an apparent career rut, rather than a high point. Latest effort Collins’ latest solo album, “Both Sides,” is at No. 76 on the Billboard 200, a disappointing early showing given that his 1989 disc “… But Seriously,” yielded four top-five singles and sold 16 million worldwide. Simultaneous with the recording deal announcement, Warner/Chappell Music has bolstered its previous relationship with Collins and his management by signing a worldwide publishing agreement with Hit & Run Music, which holds the rights to Collins’ solo songs and those he composed with the rock group Genesis. The new publishing agreement covers all territories outside the U.K.