new album after receiving an "overwhelming response" from fans when they supported Journey and Whitesnake the previous year. Sessions for the album took place at Rockfield Studios in Wales, with Morley producing the record. Much of the album was recorded without the involvement of Matthews, who was going through treatment for throat cancer at the time. Wonder Days was released in February 2015, and became the first Thunder album to reach the UK Albums Chart top ten since 1995's Behind Closed Doors, when it peaked at number 9. The album was voted the 11th best of 2015 by Classic Rock magazine, while the publication ranked the title track as the fifth best song of the year. Thunder were also named Best British Band at Planet Rock's end-of-year awards. The band toured extensively in promotion of Wonder Days, including three UK arena shows in March alongside Reef and Tax the Heat, numerous festival appearances in the summer, a run of European shows in November (including one of the first in Paris, France following the November 2015 attacks), and five arena shows with Terrorvision and King King in February 2016. Later in the year, the group released their first career-retrospective book Giving the Game Away: The Thunder Story, written by Joel McIver. The book was launched at the Louder Than Words Festival in Manchester on 12 November 2016, where the band performed a short acoustic set and spoke with McIver live. The follow-up to Wonder Days was announced in December to be Rip It Up, which would be released the following February and supported by a UK tour starting in March. The album reached number 3 on the UK Albums Chart, marking the highest position achieved by the band since Laughing on Judgement Day reached number 2 in 1992. Thunder performed their first shows ever in Australia shortly after the album's release, before returning to Europe in April for a string of dates. On 1 December 2017 the band released the single "Christmas Day", including a re-recorded version of "Love Walked In" and acoustic recordings of "Low Life in High Places" and "Heartbreak Hurricane". In October 2018, the band announced a new album with UK tour dates scheduled for February. Please Remain Seated was released through new label BMG on 18 January 2019, with "twelve radically reworked re-recordings of songs from their 30 year career" and has been described as "a more