... one with erect inflorescences, and one with inflorescences borne higgedly-piggedly. The other limes commonly encountered in Britain have pendulous inflorescences.
I can see several immature inflorescences in the first photograph (only two in focus). They all look pendulous.
Other markers for Tilia cordata are a greater number of flowers in the inflorescence, and a blue cast to the underside of the leaf. It also flowers later than Tilia platyphyllos and Tilia x europaea.
What reason do you have for identifying this as Tilia cordata?
Would you identify it as Tilia sp. at this stage?
From those pictures I'd say, 'it's likely to be' T. x europaea but does the species matter for the interaction highlighted by Jonathan?
Among big old trees Tilia x europaea predominates, but among more recent plantings (including trees of the size of this one) Tilia cordata, Tilia platyphyllos and Tilia x euchlora are all quite common, at least in my area of the country.
I'd suspect this one as being Tilia x europaea, but can't make a definite identification (between these 4 species) from these photographs.
Thanks, all. I was just going by size of leaf, but obviously its more complicated than that!
University of Edinburgh and Biodiversity Observatory (OU)
Lat/Lng: 51.585666666667, -0.16533333333333
OS grid ref: TQ272890