Effectiveness of Crow Foot Earth Pits

There is nothing wrong in his suggestion.

The consultant has suggested this in the hope that the three crows foot earthing pits will ensure a good ground at all times. He also connects them together at a single point and from that point runs a connector to the lightning rods on the peak.

The use of three crows feet tells me that the earth in the area may be dryer (or high, leading to drained foundations and low water tables?) than usual and the consultant wanted redundant connections to get better conductivity. Is the area dry? Is the area high?

typical installation

No sir, the area is close to river.

If the crows foot is in wetted ground, you may be able to use a single one.

What does the local building code require?

What does the consultant say about his reasons for three being needed?

There may be a requirement for a very low earth resistance reading (2ohm). Or it may be due to geology - is it a rocky area?

A very good earth resistance value is desirable (preferably <1 ohm) to ensure effective discharge of lightning current to ground and avoid flashback to other utilities. Refer to BS6651 or the updated standards on lightning protection.

That's good.

I wonder if OP is wondering whether there should be more than 1 downconductor? Per figure J14 of your citation.

That's a great website. I've referred to it many times myself when I've needed to confirm an assumption or make a call.