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... but it's hard to tell from photos - sorry, Pip! Cupressacea are a really difficult set to get to grips with.
I hate to say this, but did you sniff the foliage? (I say that, as I have a really poor sense of smell, but some people are luckier) According to some people, the smell of a conifer (crush some of the smallest branchlets between your fingers) can help to ID it.
The general "untidiness" of the tree would suggest Leylandii.
Close-ups of the leaf scales would also help with ID - please see below my signature for a cheap way to get good close-ups.
How to take close-ups with cheap phone and hand-lens:
Field Guides for Budding Botanists:
Lat/Lng: 53.201534, -2.885177
OS grid ref: SJ409675