Understanding an Openreach survey

A client has received this quote from BT Openreach which came as a bit of a shock as the surveyor indicated it should be below the £2,800 allowance or if above it, not by much. Anyone able to expand on it? I can guess what some of the items are.

Thanks, Rob.

Total cost: ££9151.62
Breakdown: Survey 1 x £245.14 = £245.14
Blown Fibre 345 x £2.07 = £714.15
Tubing 305 x £3.43 = £1046.15
Internal Cabling 5 x £6.47 = £32.35
Duct Carriageway 45 x £112.05 = £5042.25
Joint Boxes Carriageway Small 1 x £2889.58 = £2889.58
TMA £1982.00

= £11951.62 minus £2800 allowance = £9151.62

Breakdown: Survey 1 x £245.14 = £245.14 - The cost of the survey.
Blown Fibre 345 x £2.07 = £714.15 - 345 metres of fibre @ £2.07 per metre.
Tubing 305 x £3.43 = £1046.15 - 305 metres of fibre tubing @ £3.43 per metre.
Internal Cabling 5 x £6.47 = £32.35 - 5 metres of internal cabling @ £6.47 per metre.
Duct Carriageway 45 x £112.05 = £5042.25 - 45 metres of duct installed in the road @ £112.05 per metre.
Joint Boxes Carriageway Small 1 x £2889.58 = £2889.58 - 1 joint box installed in the road.
TMA £1982.00 - Traffic Management Activities (e.g. Traffic lights, signage etc.)

Most of the cost is attributed to Civils (roadworks).

I assume this is for FoD, if so then I'm wondering what the desk survey quote was for comparison sake? Most of the cost does seem to be roadworks however.

Sort of - actually a leased line where there is an existing unused 100Mbps circuit about 50m away from the premises. But don't think there is a leased line topic area here?

It looks like they are doing 300+ metres of ducting so assumption is that once surveyed they decided not to use the existing leased line - you would have to ask BT why.

In reply to a post by ian72:

It looks like they are doing 300+ metres of ducting so assumption is that once surveyed they decided not to use the existing leased line - you would have to ask BT why.

Good spot - I arrived half way through the survey so wasn't there when they were talking about the first part. I'll speak to my client to check his recollection.

In reply to a post by ian72:

It looks like they are doing 300+ metres of ducting

I disagree.
Although there is only the quote to go on, to me it looks like the nearest fibre node is ~300 metres away.
250 metres of ducting already exists (probably to the unused service), with a joint box required to break into it and another 45 metres of new duct required to extend to the required location.

Could be.