In February 1989, My Bloody Valentine began recording their second studio album at Blackwing Studios in Southwark, London. Creation Records believed that the album could be recorded "in five days," but it soon "became clear that wasn't going to happen." Following several unproductive months, during which Shields assumed main duties for the musical and technical aspects of the sessions, the band relocated to a total of 19 other studios and hired a number of engineers, including Alan Moulder, Anjali Dutt and Guy Fixsen. Because of the extensive recording time, Shields and Alan McGee agreed to release another EP, and the band released "Glider" in April 1990. Containing the lead single "Soon", which featured the first recorded use of Shields' "glide guitar" technique, the EP peaked at number 2 on the UK Indie Chart and the band toured in the summer of 1990 to support its release. In February 1991, while still recording their second album, My Bloody Valentine released "Tremolo", which was another critical success and topped the UK Indie Chart.