[SOLVED] Diagnose my starter problem please

[keratos]

When I press the engine start start I  hear a click but no turnover. A few presses and then the engine spins and ignition, fine. The number of presses required is random. This only started happening this morning.

What happens:
1. I notice the Datatool DiGi does not illuminate - it used to.
2. Battery light on instrument panel does not illuminate - should it?
3. Neutral light illuminates.
4. Headlights, Rear lights, and signals work.
5. Once started the engine runs fine.
6. Horn works fine.
7. Spark plugs recently fitted - a week ago.
8. No fuses blown

???