I recently blogged on how migrating an FTTC line had several issues, partly that it costs £50 not a lower figure used for normal migrates, and also that the old ISP is tied to 12 month term at the same time as new ISP.
It seems that in some cases the migration is only costing us £11 not £50, where it is BTW to BTW migration (so no Openreach involvement). This is in line with normal migrations of ADSL where BTW to BTW. The fact that we thought this was £50 was indeed one of our primary complaints, and as that appears to be based on a mistake in our reading of the price list, I do apologise to BT.
We are trying to confirm how we can tell when this applies from the checker. The £50 applies when migration from non BTW FTTC (e.g. direct LLU/GEA FTTC).
Sorry if this sounds a tad technical, though that is part of the problem here :-)
We think that BT are still holding previous ISP to 12 month term even where new ISP takes over the line. If we have that wrong, we are more than happy to apologise for saying that... We're trying to confirm that now as it is not clear.