thank you. There is no right to take photographs or record images in an area where someone has the expectation of enjoying privacy. This would include a private garden.
he is unlikely to be able to comply with all of the above requirements as there is objectively unlikely to be any justification for his taking photos of your garden and as such, given that he will of easily have failed to comply with any of the above requirements and in any event will not be justified in taking photos in the first place which is a further requirement of the act, you can raise a complaint with the information Commissioner in respect of your neighbours activities in this respect which can impose a substantial fine
you can also raise a complaint with the police as taking photos in your private garden will amount to a statutory nuisance and also likely an offence under the protection from harassment act.
finally, there is redress in the County Court's yourself if you prefer alternatively if for some reason either of the above approaches do not fully deal with the issue whereby you could serve a cease-and-desist notice and subsequently seek an injunction on grounds of common-law nuisance: