Easy job, correct part number is BEC14085, still available new...
I only have Jaguar parts/cars at hand at the moment, but seem to remember the Daimler badge is fitted from below?
In that case I would recommend grille removal: a much easier job with the grille off the car.
Here's the exploded view from JCP: https://parts.jaguarlandroverclassic.co ... nd/jaguar/
And here's a link to the part page on JCP: https://parts.jaguarlandroverclassic.co ... 8823754346
Grille removal procedure:
Step1: get the two grille vanes out. Each is held in place by two tiny Phillips screws. Look up and you will see them. You will also be disappointed finding out that those vanes are plastic...
Step 2: you now have access to the grille bolts, two each side. Heads are behind the grille and are 8 or 10mm from memory. A ratchet spanner is ideal for this!
Step 3: take the grille off, you can now access the pin and clip that hold the badge in place (for a Jag) or refit the 'D' emblem (for a Daimler).
I have taken some pictures of a spare Jaguar grille I had in the parts shed.
Removal is identical to a Daimler grille, it's just the badge fitment that differs:
Grille seen from the lower end up: this nylon thingy holds the vane screw in place. Two screws per vane, so 4 in total.
Back side of the grille: these nylon plugs hold the grille fitting screws, two each side:
Back side top of the grille: you can see the silhouette of the badge as well as the fixing pin:
Top rear side: close-up of the pin and locking clip