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It is a Syprhid, genus Volucella alright, but I'm not sure about the species. As the lateral prolongations are short it looks like V. bombylans as depicted in Ferrar (1987), fig 84.11 and Volucella sp in fig. 84.48.
The Key in Dixon (1960) is attached but I'm not sure if your larvae has fleshy projections laterally or not as meant by Dixon (question 7). They are present in your larvae but pretty short. I do not have his paper complete so I cannot check the figures. So if I choose for lateral projections present it keys out as either zonaria or pellucens. however, If I look at Rotheray (1993) in his plate 3f (V. pellucens), your larvae does not have those long lateral prolongations. So I think your larvae would turn out to be V. bombylans.
AND: please add your photo's to the gallery. Larvae of this species are missing..