Advice needed please: Upgrade factory supply from 100A/3ph to 400A/3ph

[thegruf]

Have a quote from UKPN - £10K (with us doing the trench and duct work on our property). Actually could be worse I know, but as the substation is literally across the road it is still quite pricey.
UKPN refers to ICPs who can also do the work.
Is it worth worth trying any of these, in which case any recommendations for Hitchin, Herts area or is it best just to stick with UKPN?
Any other factors I should be aware of?
thanks.

 

[R-fur]

Usually always cheaper with an ICP, don't know any in your area.

 

[thegruf]

Thanks for confirming - exactly what I thought would be the case.
I guess a lot of the ICPs are involved in much bigger projects than a comparatively small job like this though.
If anyone can recommend a suitable ICP in this area would be much appreciated