In uk.transport.london Recliner wrote:
"It has been decided not to have tables in standard class. Passenger
research for the rail watchdog, Passenger Focus and London TravelWatch
showed that people recognised the main priority was to maximise capacity.
Seat tables are a nice to have but they also slow people down getting on
and off trains – and we’ll have just 30 seconds to get people on and off
these new trains in central London.

It is noticeable that the 365 'refresh' has removed the tray tables,
procured by the very same TOC.

They were of limited usefulness: had a hole for a cup and a small space, but
not enough to put much on, and tended to collect dirt. However they were
also a useful shelf to prop up a laptop.

^MOur priority is to get more people from A to B as quickly and as reliably
as possible. These new trains will give us more carriages and more capacity
and much better reliability than existing trains, which is what people
want.

But some of those people will be doing two hour journeys and working on the
train is a thing, sources reveal.

Of course, the actual order was confirmed in, I think, 2013, not 2008, when
discussions first started. So there's really no good reason why the spec
wasn't updated to include Wi-Fi in the intervening five years of debate,
discussion and negotiation.

Is there any plan to fit them with wifi post-delivery?
And do they allow or block mobile signals?
(not a panacea, so many gadgets omitting a GSM radio)

Theo