The Sterling Yield Map show the "yield curve" for UK gilts (solid line), this being a plot of the yield available on UK government bonds at various maturities.
Overlaid against the gilt yield curve are the plots (marked as dots) of yields on individual corporate and other bonds.
To use, simply move the cursor over the datapoint to display bond name. Clicking the datapoint will bring up the chart and additional instrument data.
To search bonds ranked by issuer, maturity etc, use the the tabular display here.
Note: A typical yield curve will show yields rising with maturity, but the shape may change with expectations for future rates, and of course, supply & demand.