Fictional: X43 and X53 in Superloop (if not withdrawn)

Superloop with old X43 and old X53, withdrawn in 1998 and about 1999 (in time for Jubilee Line extension opening) respectively. 

X43 was replaced by enhancements to 43's frequency. 

X53 was replaced by the Jubilee Line which goes Thamesmead. 

Wait a minute. 

Yeah the Thamesmead people got screwed over big time. If they still existed they'd be numbered chronologically in the loop, now that it the numbers are confirmed.

P.S. reupload to due updated map 

P.S. It's a horrible map and made me almost tear my hair out fitting the X53 in and sacrificing sense by ignoring X43 actually crosses the river to reach London Bridge