But this is the last weekend this is the case I believe. From Sunday it's a full 7 day service
There's a fair bit of engineering works East & West over the next few weeks that affect through running. For example 12/13th and 19/20th, nothing is running between Shenfield - Whitechapel/Liverpool Street due to NR engineering works. On the 19th/20th Heathrow is also shut (so it will be a Hayes - Abbey Wood service).
On those days a few more Abbey Wood - Paddington services will run to compensate the core frequency.
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Well if we want a comment about the current Elizabeth operations, it has been decided to close it for the whole weekend in the last few weeks. Not just Sundays, the case since May, but also Saturdays as well. This right into the Christmas shopping period, which is now well under way in London, and invalidates all the stuff about Bond Street "opening in time for Christmas shopping" when it's closed for the two busiest shopping days of the week. It will be doubtless shut next Saturday, this time due to strike, as well.
If there's a strike, it will probably run in three parts again on those specific days due to the discrepancy in infrastructure availability (no strikes for signallers in the central section) but a reduced service due to trains needing to access depots on NR infrastructure.
This is the same as its been all previous strike days; Abbey Wood - Paddington has never been "shut" on a strike day.

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