Join Date: Aug 2011
Location: Barcelona, London, on a plane
Programs: IB+ Gold, TK E+, Hyatt Globalist, Marriott LTP, IHG Diamond
Posts: 14,178
One night is hardly worth choosing the destination based on a hotel. There aren't really any Hilton Honors properties in UK/Ireland that are worth traveling to just for the hotel...
London is going to get you the highest £ value, or perhaps the W-A in Edinburgh.
FWIW the Conrad in Dublin is just a regular 4* hotel IMO, and nothing like the standard for Conrad in Asia, etc.