Sykes later left to join Whitesnake and was replaced by Laurence Archer upon Stanway's recommendation.

In 2016, Stanway reformed Grand Slam for a Sweden Rock Festival performance with Micky Barker (ex Magnum) on drums, Neil Murray on bass, Laurence Archer on guitar and Stefan Berggren on vocals.

During this career, Stanway has performed and or recorded with many notable artists over the years including Robert Plant, Roy Wood, M3 Classic Whitesnake, featuring original Whitesnake members Micky Moody, Bernie Marsden and Neil Murray, Swiss Star Bastian Baker, Jimmy Copley, Manfred Mann's Earthband, The Quireboys, The Dogs D'amour, Mississippi blues singer Lisa Mills, Karl Wayne, Junior Giscombe, Spike Gray, Simon Kirke, Luke Morley, and The Sweden Rock Symphony Orchestra.

On 9 December 2016, Stanway announced that he has left Magnum, mid-way through their five date Divine Lies Winter Tour.

In July 2019, Murray was amicably replaced by Brian Badhams (ex Rainmaker, Steve Gibbons Band, Alaska, and continues to perform with Ellie Brooks).