DATA Market & Price Data

List of all symbol on all exchanges
http://datasrv.ddfplus.com/names/

Eodata
Free and paid models, All exchanges, Up to 1 minute data
http://eoddata.com/symbols.aspx

Stooq: 5 min data

Bonnot gang: perfect data, but delayed by several days

Finam: (Russian, spell FTSE as FUTSEE) https://www.finam.ru/profile/mirovye-indeksy/futsee-100/export/?market=6&em=93&code=UKX&apply=0&df=27&mf=5&yf=2017&from=27.06.2017&dt=29&mt=5&yt=2017&to=29.06.2017&p=2&f=UKX_170627_170629&e=.csv&cn=UKX&dtf=1&tmf=1&MSOR=1&mstime=on&mstimever=1&sep=3&sep2=1&datf=1&at=1
Yahoo Finance: no intraday download

Google Finance: no intraday data for download (view only), no download for FTSE

The CME has free tick data of all their Globex and pit products. You can download a list of all trades from the previous 5 trading days at http://www.cme.com/ftp.wrap/time/

So besides the BBA site for 1-12 month LIBOR fixings http://www.bba.org.uk/bba/jsp/polopoly.jsp?d=141&a=627

http://www.ma.hw.ac.uk/~andrewc/gilts/ UK gilt data,

http://213.225.136.206/statistics/yieldcurve/main.htm has some yield curve data for the UK.

Historical FX Rates: http://oanda.com/convert/fxhistory

Historical Stock Prices: http://finance.yahoo.com/q/hp?s=yhoo

Recent LIBOR rates: http://www.bba.org.uk/public/libor/

Some Implied Volatilities: http://www.ivolatility.com

Delayed Commodities: http://www.liffe-commodities.com/

US Fundamentals: http://www.sec.gov

Economic data:
UK: http://www.statistics.gov.uk
US: http://www.census.gov
http://www.bls.gov
http://www.federalreserve.gov
http://www.ssa.gov
http://www.treasury.gov

Dukascopy

Here is a downloader for the site above that is free from
WorkSmarts

Finam