These links may be helpful:

http://www.roymech.co.uk/Useful_Tables/Drawing/Weld.html

http://www.twiprofessional.com/content/jk64.html

http://www.twiprofessional.com/content/jk65.html

http://www.gowelding.com/weld/symbol/symbol.htm

This book is only $66.50 USD:

http://www.woodheadpublishing.com/en/book.aspx?bookID=872

Here's an online book that's free!!! Just scroll down to page 210 for British Standard Welding Symbols and you're good to go!!!:

This site the book is a tad more expensive:

http://www.crcpress.com/product/isbn/9780849335914;jsessionid=lsnAvQMgdKT20BECOiF2AQ**

These folks want so much more for the same book:

http://www.buy.com/prod/welding-symbols-on-drawings/q/loc/106/31155882.html

These British drawing standards will be helpful also:

http://www.roymech.co.uk/Useful_Tables/Drawing/Drawing.html

Here's another site that gives you a pretty inexpensive option:

http://www.techstreet.com/cgi-bin/detail?product_id=40695

Here's an updated version from the same folks:

http://www.techstreet.com/cgi-bin/detail?product_id=1103166

Here's a link to a file library of some symbol files for autoCAD as well as some other program application files... Just scroll down the page until you see BSWELDSYM.ZIP then open the file with a zip utility and use it as a .dwg file on whatever version of AutoCAD you have available:

http://204.101.252.14/library/symbols.html

This one is an excellent book, and I have copy myself... As far as the price is concerned, look at the left side of the screen when you're in the link, and look for where it says: "Google book search, then type in the name of the book and it should give you a list of available online book vendors that will sell you the book at a variety of different prices:

http://www.cambridge.org/catalogue/catalogue.asp?isbn=9780521435666

This .pdf file may be helpful to you:

http://bbssystem.com/manuals/Aluminum-Welding/35679_ap1.pdf

Finally, here's an online book that has British welding symbols... Scroll down to page 210, and you're good to go! :

http://www.scribd.com/doc/6714756/Design-Manual-of-Engineering-Drawing-To-British-and-International-Standards

If these links don't help you, then I'm afraid that nothing will!!! ;)

Respectfully,
Henry