The alternative is just empty gas holders which may have some historical value? I can find no information that they are of a rare design or have some significance

there are probably only two other surviving early pioneering examples with tee-section lattice guide frame standards, both in London. The No. 1 gasholder at Kennington, near the Oval, was completed a year later in 1879 but its standards were subsequently raised; and the 1882 gasholder at Sydenham.

http://residents-first.co.uk/the-histori...gasholder/