Chiswick Capital-Wimbledon Chase - every 10 minutes
Corpus Christi-Westcliff - every 9-11 minutes
Semi-fast services:
BX3 CHKS: Corpus Christi-Fareham - every 15 minutes
Other services:
CHKS run slow services every 7-8 minutes alongside CHKU semi-fast services between Corpus Christi and Westcliff/Chase Hill
CHKS run fast services every 20 minutes between Houston and Westcliff/Chase Hill
Night service level
All stations services:
Chiswick Capital-Olympic Park - every 20 minutes
Chiswick Capital-Rutland - every 20 minutes
Semi-fast services:
Chiswick Capital-Norbiton - every 20 minutes
No service on Christmas Day Night service between Rutland and Wimbledon Chase is provided by Bunny Rise line services
History:
Split off the Orbital line in 1991, it runs on the southern half of the Orbital line, running on the former alignment between Corpus Christi and Chase Hill.
Currently operated by ChisGroup for Transport for Chiswick
Current Rolling Stock:
1991 Stock: Class 459
Built in 1991
From WPC (domestically built)
Replaced early AMM electric units
Ordered for Chising line
Powered either via overhead wires to 25kV AC or third rail 750V