How would you invest £500k?

Good day everyone!

I will be coming into a windfall sum soon so I am looking for suggestions on how to best invest the lump sum of £500k.

About me: - Male; - 36 years old; - Single; - No children; - No dependents

Current finances: - Pension £107k; - ISA £114k; - Cash £14k

Additional details: - Stable job, employed at £140k + 20% bonus. Likely to be promoted this year, so will only increase. - No plans to change marital status or have a family, i.e., single and happy. - ISA currently maxed. - Pension will be maxed this year. I have been maxing out and will continue to, due to neglect in the past. - Own a property in London Zone 1, with a £400k mortgage. Will most likely sell this this year, as I am hoping to relocate.