Chatfield asked about EXPRESS and ELECTRA. LB posted several photos (now removed) of both ships on this thread a few years ago - he may be better placed to comment. My thoughts:
EXPRESS:
Agree with different boat stowage (the foc'sle deck was extended aft a little to allow space for the whalers), the tripod mainmast, bridge wings and foremast.
Never seen a photo with a deckhouse replacing the aft torpedo tubes. All photos I've seen show the usual slightly raised platform (to clear the mounting ring for the torpedo tubes) with the 3" HA gun on it.
By February 1942 she appears to have worn a Western Approaches camouflage scheme - see
http://cas.awm.gov.au/item/302386 (if the AWM caption is correct).
The fit aft must have been quite crowded. On the quarterdeck (RN ships didn't have a fantail - that's an word only used by our transatlantic friends!
), as well as "Y" gun mounting (the 4.7" guns were fitted in open shields, not true "turrets"), she had the TSDS fit plus minelaying sponsons (I doubt that the actual rails were still fitted, but that's not impossible), so the davits were there, as were the paravanes and the centreline fitting, with (possibly) a single depth charge rail underneath it, and the TSDS winches were fitted just for'd of "X" gundeck.
(Edit) Taller torpedo davits fitted each side - in order to be able to lift mines onboard, a longer jib section was required, so she and ESK had extended davits from build.
ELECTRA:
Agree with description of foremast, bridge wings, aft TT missing, 3" as above, aft funnel, boats and colour.
Mainmast originally fitted for'd of "X gun had been removed; a shorter mast, with a yard and a gaff, had been added on the searchlight platform.
There was no large box structure with supports on the front of the bridge. What is visible in several photos is the bracket carrying the MF/DF aerial, just above the centre wheelhouse window, with, above it, the housing for the chart table protruding through the for'd screen of the compass platform.
She was fitted with TSDS - the winches on the iron deck just for'd of "X" gundeck and the paravanes remained in place, as did the structure on the centreline and, possibly, a depth charge rail on the quarterdeck. In the only photo I've seen showing this area, it's difficult to make out whether the davits were still in place on the quarters.
The only Carley Float location I can identify is one placed horizontally above the muzzles of the remaining torpedo tubes.