Can Anyone "shed some light.."

Yes they might well be NS types fuses, these are entirely suitable. However the term "blade fuse" is often used in reference to the vehicle fuses.

I think we need more info to be sure of what is there - if the OP is still stuck after making another visit, then taking some pictures and sharing them might help inform discussion.

(Yes I wondered about what was meant by  a 'blade' fuse i n this case , but no-one would use one of these on a mains design - would they ?
 
- I assumed a fuse holder with blades for round fuses. like a small one of these..)

To be fair, unless the main supply is shared with something really bosky say more than a 16A breaker, I'm not sure why each bollard needs its own fuse anyway.

Again a photo would probably avoid confusion.
Mike

Morning all,

Thanks for all your suggestions and input!

The long lead (it would need to be quite long!) Temporary supply is not a bad shout to verify whether a supply or at end of line issue 

The bollards are all on one circuit, -and as above, the oddness was due to them All having stable mains voltage present.

Nb, no funny car fuses or oddness, some bollards come with a small street lighting fuse in line, above the SWA gland plate and below terminals with internal cabling which supplies the lsmp holder.

You mention overriding the time clock, have you tried shorting out the time clock to rule it out, in case of any unusual interactions with the load. (failing switching device, or solid state switching device with a minimum load that isn't compatible with low energy lamps).

Or alternatively, you mention trying different lamps - have you tested it with a regular 60W filament lamp, something guaranteed to draw a reasonable ~0.25A resistive current.