QGIS isochrone layer ID reference

[Steve]

Firstly, thank you for this excellent service.

I am trying to use with QGIS to create isochrone drivetimes around a series locations in the UK.

There is an option under the QGIS plugin to 'use layer' under the isochrone menu.  The resulting isochrone shapefiles that are returned have three fields

AAMINS - The minutes used to create the shape

AAMODE - The method of transport used

along with the GEOM, the geometry of the Isochrone shapefile.

I'd like to join back to the source layer to I can identify and label each isochrone. However, there doesn't seem to be any reference created that links back to the original input.

At the moment I can't see anyway to do this apart from separating into individual shapefiles, which defeats the object of using the layers function and isn't really practical as I have 100's of isochrones to create.

Can you please let me know if I am missing something and if there is anyway to identify back to the source location.

Thanks