I echo TruffleHunter's points and also believe that my child is happy and excelling at the Lyceum. I'd self describe as an academically-focused parent with visions of world domination (or at least an Ivy League university) for my child. That said, for primary school, I wanted my child to explore as many new things as possible in a supportive environment.
My child has also been at the Lyceum since nursery and is now in Year 6. The current headteacher, Mrs. Wyatt, has made a lot of positive changes since she joined, and we're sorry to see her go, but I'm confident the school will find another strong head to take the school forward.
The Lyceum has delivered in spades by focusing on producing kind, confident all-rounders. Perhaps like all parents, I think my child is pretty clever, and I'd say our child has had an academic experience practically tailored to her interests and abilities. In fact, if there's any complaint about the school, it could be that the kids get a little too much individual attention and could do with more of a sense that it's a big world out there/they're not so special. But hey, they're primary-school kids - let them think they're snowflakes just a little while longer.
We're a couple of weeks away from learning our children's 11+ results, but I believe our child was as well-prepared (and will achieve as much) as any from the selective, more academically-focused primaries in London, with the added bonus of having spent 6+ years in an environment where everyone is recognised for their achievements, and it's low-stress and easy to try out lots of new things. I wouldn't hesitate to recommend the school to other parents.