It's complicated.
https://riskandassurancegroup.org/uk-070-number-range-consultation/
<quote>
2017 Ofcom consulation: Do you have any further comment on our proposals for
regulating 070 termination rates? Please provide reasons and evidence in
support of your views.
RAG: Rather than imposing price changes which are restricted to 070, Ofcom
may also wish to consider kicking off the wider strategic initiative of
reviewing and improving the UK telephone numbering plan. This could be done
in such a way as to create a real separation between ‘normal 07 mobile’ and
‘all other expensive 07 type destinations’ We observe that there are many
other 07 destinations which cause issues such as 07305 – fw10, 074180 –
fw12, 074521 – fm11, 077978 – f. These types of other destinations have also
been seen to occasionally result in bill shock, service provider fraud or
international artificial traffic inflation. They are also, like 070,
generally omitted from free bundled mobile minutes for UK consumers.
<snip>
</quote>
Ofcom's response (2018) only relates to 070 numbers, but set termination
fees for them to be the same as mobile numbers. It appears it didn't
address 07305, although individual telcos like BT were free to do their own
thing.
I would ask the OP: are you *sure* the number is correct? It seems
surprising that a fw10 number would be issued as a UK mobile number, which
leads me to suspect that somebody made a dialling or similar mistake.
Even Virgin's home phone plan has fw10 as a special price band (10p/min).
Also to note, there's a long 2017 thread here:
https://community.plus.net/t5/My-Account-Billing/I-called-my-Husbands-mobile-and-it-cost-me-45/td-p/1446113
which has someone complaining about an 074882 (post#19) showing up as fw10
- but now on Codelook it shows as fm1. So it appears some numbers have been
reallocated, and maybe Talktalk haven't kept up. The Ofcom numbering plan
document gives 2016 as the date of allocation of 07305 to Virgin, but I
can't find the document where Ofcom give the charge bands, which would be
the authoritative source.
I'm wondering whether 07305 has changed charge band and TalkTalk haven't
kept up? Or Virgin have started issuing mobile numbers in fw10?
Theo
the numbering plan is such a mess :-(