"Action Sport Transfers"… that name rings a distant bell.
Original photo courtesy of Nick Symes
1986 is too late for "Action Transfer Products", Thomas Salter having dematerialised by now, so these must be by Acorn.
Original photo courtesy of Nick Symes
After seeing this page, Adrian Allen got in touch to provide scans of another three of the eight sheets in the set. It looks to me as if there would have been four pairs, each pair covering a different sport — featuring cars, motorbikes, horses & running.
Original scans courtesy of Adrian Allen
Picture Credit: The SPLAT Scan Archives — Nick Symes
© Tom Vinelott 2023