Lock Island's streets are the kind where a terraced cottage sits a few doors from a detached house well into seven figures, and the cars parked outside tell you this is a moneyed pocket of Buckinghamshire rather than a typical commuter suburb. It's small — under 900 people packed onto a dense little footprint by the water — and it has the quiet, self-contained feel of somewhere people move to rather than pass through. The numbers back up that first impression. A house here carries a median price of £625,000, well above both the national figure and the Buckinghamshire average, and detached homes trading at a million pounds against a national median of £420,000 tells you this is one of the pricier corners of the county, not just the country. Freehold terraces dominate what actually sells, which suggests a stock of solid period housing rather than new-build flats — reinforced by a new-build rate of zero. For schooling, Sir William Borlase's Grammar School gives the area a genuinely outstanding secondary option, the sort of thing that anchors families here even without a large population to sustain it. Renters pay noticeably more than the national norm too, so this isn't a place that's cheap to test out before committing. Green space is modest but present — getting on for ten hectares of it — and with only one named space to speak of, weekend life here leans on the water and the surrounding countryside rather than parks in the conventional sense. What stands out more, looking at the grade pattern, is a genuine mismatch: this is an area that scores strongly on safety overall, yet the health grade sits meaningfully lower, a C+ in a set of A's and B's. Crime itself is dominated by violence and sexual offences and anti-social behaviour, which is common enough for a small, dense population, but the rate compared with the wider Buckinghamshire authority is sharply elevated — nearly three times the parent area's rate — even though the safety grade reads well against national averages. That's the kind of contradiction worth sitting with rather than resolving with a single number: a place that feels safe day to day, according to the broader grading, but where the raw local crime rate is doing something the grade doesn't fully capture. Put together, this reads as a settled, older-skewing community — median age closer to 44 than the national 40 — with strong connectivity, decent housing stock, and a school worth moving for, sold at a price that reflects genuine local desirability rather than hype. It will suit people who've already decided they want this specific stretch of Buckinghamshire and are prepared to pay for it, more than someone shopping purely on affordability or nightlife, both of which sit in the middle of the pack here rather than the top.