Hi

When you upload your run from your GPS go into the training menu and select log book to see all your entries.  Then when there are splits there will be a graph symbol in the pace column.  Click on this and you will see a graph and can also select the data tab to see in this format.

Well done on doing London  - I hope you achieved the time you wanted.  When I did London a few years back, though, the GPS didn't come out very accurately, particularly in Canary Wharf through all the tall buildings.  That was quite an old version of the Garmin forerunner so hopefully yours will be ok.

Having just run London Marathon -is there any way I can view splits of my half marathon time within GRG.

Thanks