Complex sentence: Numbering was differentiated between those allocated to the Isle of Wight and the mainland, with those on the island numbered W14 to W36, and those on the mainland were numbered 177 to 236.
Split into simpler sentences: Numbering was differentiated between those allocated to the Isle of Wight and the mainland, with those on the island numbered W14 to W36. Those on the mainland were numbered 177 to 236.