Long as it's not a gasket issue I'm happy!
Ok this morning I filled radiator and filled coolant , parked with front end raised engine running with rad cap off heater on max facing windscreen did the old upside down coke bottle trick let it warm up and gave all pipes a good squeezing, let it cool checked levels and fine, went for a drive around 15 miles got home let it cool againand was very strange, radiator seemed Ok but bit where I had filled coolant was completely empty! Do you think it is a radiator issue? cheers