Thank you Steve Collingwood :)

Steve Collingwood (Telescope House, Lingfield, Sussex) kindly spent a not inconsiderable amount of time collimating my 2 Sky 90 refractors.   Steve showed me the process as he worked away on his custom-built rig.  All very impressive and now I just need to fit the scopes back in the mini-WASP frame and see if they held onto their collimation on the trip home.