Range Rover Vogue 2001 4.6 V8 Petrol Help

Good evening, new member here.

I had an intermittent fuel starvation issue / lack of power.
I fitted a new fuel pump into the fuel tank.
Battery replaced.
Inertia switch warning on dash.
When switch is bypassed, 12v supplied to pump, yet inertia switch warning still active.
Inertia switch stripped and cleaned after many presses of the rubber button.
Fuses checked, relay checked.

Do I need to reset anywhere else?
Please help, as I need the car running ASAP.

It may need a reset at the BECM

Ok first off with lack of power / fuel starvation what was your diagnosis that led to fuel pump ?

Fuel pump diagnosed from previous posts on here and other sites.
Ty

Can you describe the lack of power ?
I'm asking as it may not be the fuel pump that caused it if you've replaced and still having the same issue