Gascoigne signs a contract at White Hart Lane until the end of the 1992–93 season.  12 July 1988 – The long hunt for a new Wales national football team manager ends when Swansea City manager Terry Yorath is appointed on a part-time basis.  13 July 1988 – Gordon Cowans ends his three-year spell at Bari to rejoin Aston Villa in a £250,000 deal, while Everton strengthen their midfield in a £925,000 move for Chelsea and Scotland midfielder Pat Nevin.  19 July 1988 – England defender Gary Stevens moves to Scotland in a £1 million move from Everton to Rangers in the costliest transfer involving a British defender. He is replaced at Goodison Park by Newcastle United's Neil McDonald.  20 July 1988 – After two seasons at Barcelona, Mark Hughes returns to Manchester United for a club record £1.8 million, breaking the previous record of £1.75 million that the club paid for Bryan Robson seven years ago.  25 July 1988 – Less than three weeks after Tottenham broke the national transfer record, a new record is set when Everton complete the signing of West Ham United's 23-year-old striker Tony Cottee for £2.2 million.  28 July 1988 – Billy Bonds, the oldest player in the Football League at 41, announces his retirement as a player but will remain with West Ham United as youth team coach.  1 August 1988 – West Ham United sign striker David Kelly from Walsall for £600,000. Newcastle United sign defender Andy Thorn from FA Cup winners Wimbledon for a club record £850,000.  8 August 1988 – Graham Roberts returns to England in a £470,000 move to Chelsea from Rangers.  13 August 1988 – The first North London derby to be held at Wembley Stadium ends in a 4–0 victory for Arsenal in the friendly Wembley International Tournament; Gunners' goalscorers are Paul Merson, Alan Smith, and Brian Marwood (2).  14 August 1988 – Arsenal beat FC Bayern Munich 3–0 to win the Wembley International Tournament on goal difference.  17 August 1988 – Nottingham Forest sign England midfielder Steve Hodge from Tottenham Hotspur for £550,000.  18 August 1988 – After an unhappy season at Juventus, Ian Rush returns to Liverpool for £2.8 million. It is the third time in two months that the national transfer fee record has been broken.  20 August 1988 – Liverpool gain revenge for their FA Cup final defeat by Wimbledon in May by beating them 2–1 in the Charity Shield.