With the current timetable fast services are much more limited than 9 years ago.
Three fast services in the morning:
0648 Shoeburyness - Fenchurch, non-stop from Laindon - Fenchurch
0702 Shoeburyness - Fenchurch, non-stop from Chalkwell - West Ham
0718 Shoeburyness - Fenchurch, non-stop from Chalkwell - Basildon - West Ham
Evening peak is more complicated,
1846 Fenchurch - Shoeburyness which takes 60m is the fastest time wise
1743 Fenchurch - Shoeburyness has the fewest calling points, fast West Ham - Laindon - Benfleet
1716 & 1816 Fenchurch - Shoeburyness both take 1hr 1m however they both have different calling patterns
Until Dec 2017 the 1701 Fenchurch - Shoeburyness was fast West Ham - Benfleet and until May 2019 the 1743 Fenchurch Street - Shoeburyness was also fast West Ham - Benfleet until Laindon was added. The last fast service in terms of stopping pattern was the 1813 Fenchurch - Leigh-on-Sea which was fast West Ham - Benfleet as this was only 4 carriages. This ran until the Covid timetable reductions which eliminated 4 carriage trains on c2c.
December 2015 timetable introduced a more standard calling pattern with only very few trains missing Barking, West Ham or Limebouse, and removed the majority of the Laindon terminators. The missing stations were added into the fast Shoebury trains and additional new Leigh-on-Sea trains. However these were subsequently changed weekly as they fine tuned the timetable after it was introduced over the space of a few months
Pre 2015 there were also occasional limited stop trains on the loop until 2015, such as:
0716 Pitsea - Fenchurch via Ockendon which was non-stop from Upminster - Fenchurch, and return 1702 Fenchurch - Grays via Ockendon non-stop Fenchurch - Barking.
Perhaps the oddest addition of the Dec 2015 timetable was the very brief stint of the 0710 Fenchurch - Southend, which called at Limehouse, West Ham, Barking, Basildon and Southend Central.
The timetable now is very much more standard and uniform, with very little alterations in calling patterns outside of peak flows and somewhat slower journey times.