As the slowdown in the London luxury property market continues and the sector is buffeted by new challenges stemming from the looming "Brexit", one niche of the U.K. capital's market has shown enviable resilience.

In an environment where central banks' quantitative easing has led to the suppression of bond yields and, by extension, diminished the return potential of many other asset classes, the opportunity cost of locking up funds in a medium-to-long term property play is substantially lower.