Hi guys - thank you all for the replies.
45 Park Lane looks rather special and ticks many boxes!
45 Park Lane is one of my two favourite hotels in London (the other being the Lanesborough). I don't think you will be disappointed in the hard product. There isn't a single category of room that has a shower over the bath (winner in my book). I have stayed in every single room category and my favourite are the Park Lane suites. The Penthouse is nice too. The GM, John Scanlon is such a nice person and his warmth and professionalism is reflected in the team at 45. If you want to ask any questions about the hotel please go ahead and I'll be happy to answer them.
Just as an aside The Lanesborough has not yet reopened and has not set a date for doing so. It is likely to do with the the 14 day quarantine requirement upon arrival in the UK and the nature of the clientele the hotel attracts during July and August.