I need 5x new water connections for my site. 2x resi, 3x small commercial

The water main runs across my land (grass verge alongside public highway, no pavement) and there is no need to dig up a road/ pavement/ or go across anyone else's ground. Traffic lights will probably be required.
I have dug trenches bought and laid the relevant pipes, leaving long "tails" vertically above the water main. All that needs to be done is to dig up the water main, add a 63mm connection, put a manifold on this, connect 5x meters, then connect my pipes.
I would estimate 1 day of work max. 1x digger guy - say £200, 1x spade guy - say £100, 1x qualified techie - say £200. Digger hire - say £100. Water fittings £500 max. Traffic light hire- say £200 ? Grand total, my guess, £1,300.
Anglian Water must perform some of the work, this is called "non contestable". Other parts can be done by any licensed contractor, this is called "contestable".
Anglia has given me a quote of £5,000 just to do these 5x connections. FIVE GRAND !!!!!!! Of this, £500 is non contestable admin type stuff, so I am stuck with it. The actual digging and plumbing is contestable and priced at a staggering £4,500.
Does anyone know of contractors who could do this work ? Does anyone have suggestions how I can save money ?
Thank you

The water main runs across my land (grass verge alongside public highway, no pavement) and there is no need to dig up a road/ pavement/ or go across anyone else's ground. Traffic lights will probably be required.
I have dug trenches bought and laid the relevant pipes, leaving long "tails" vertically above the water main. All that needs to be done is to dig up the water main, add a 63mm connection, put a manifold on this, connect 5x meters, then connect my pipes.
I would estimate 1 day of work max. 1x digger guy - say £200, 1x spade guy - say £100, 1x qualified techie - say £200. Digger hire - say £100. Water fittings £500 max. Traffic light hire- say £200 ? Grand total, my guess, £1,300.
Anglian Water must perform some of the work, this is called "non contestable". Other parts can be done by any licensed contractor, this is called "contestable".
Anglia has given me a quote of £5,000 just to do these 5x connections. FIVE GRAND !!!!!!! Of this, £500 is non contestable admin type stuff, so I am stuck with it. The actual digging and plumbing is contestable and priced at a staggering £4,500.
Does anyone know of contractors who could do this work ? Does anyone have suggestions how I can save money ?
Thank you