Where can I find quotes for [British Gas]
Transco Index Linked Bonds ISIN XS0103338140 ?

Hello.

According to a web page called Money Extra, your bond is described as
follows:
BG Transco Holdings
4.1875 index linked bonds due 2022
ISIN XS0103338140
http://moneyextra.uk-wire.com/cgi-bin/articles/199912141150444731C.html

The key here is the maturity date. The 2022 date allows us to identify
your bond. The Lattice Group which now owns Transco has the following
note in a recent financial statement:
"Bonds falling due after more than one year include the bond package
issued on the 1999 Restructuring and Refinancing. On issue the package
included three types of bonds: GBP503m 7.0% fixed rate, due 2024;
GBP503m floating rate due 2009; GBP503m 4.1875% index-linked due
2022."
http://annuals.lattice-group.com/accounts/notes/note_17/left_nav_content.html

You'll notice that each of the bonds corresponds with a Transco bond
listed by Yahoo Finance:
http://uk.finsearch.yahoo.com/search/quotes_uk?fname_n=txt_name&fname_t=txt_type&fname_x=txt_region&s=uk_sort&tag_t=b&tag_n=transco&tag_x=:

The "22" in the name TRANSCO HD.BD22 corresponds to the 2022 maturity
date, while the '09 and '24 bonds correspond to bonds maturing in 2009
and 2024 respectively. Thus, Yahoo Finance provides the following
quote for your 2022 Transco bond:
http://uk.finance.yahoo.com/q?s=GB0877419=L&d=t

search strategy: XS0103338140, transco, 2022

I hope this helps.

This answer is good because not only is the answer provided but some information
on HOW the answer was found is also shown.