Roger Tonkin wrote:

The front lawn slopes steeply at one end (around 45 degrees) to
a concrete edging strip. Trouble is over the years the lawn has
sunk around 2 inches below the top of the concrete, making it
difficult to cut and a risk to the mower.

How should I build it up, without making it unsightly?

My initial thought was to use turf, but that would have to be
shaved to a thin strip at he upward end to fit into the rest of
the lawn - not sure how that would work!

Any other ideas?

The standard technique, which may be difficult in your situation,
is to slit and peel back sections of turf, pack extra soil
underneath as required, then flatten back to the desired profile.

It can take some time, and effort (BTDTGTTS) but works well.

Chris
--
Chris J Dixon Nottingham UK


Plant amazing Acers.