British Gas customer claimed £300 for solar power but received £38,611.59 by mistake; she spent seven weeks trying to give it back

• The homeowner, identified as DT from Sale, submitted a routine quarterly feed-in tariff (FIT) claim for £300 in May after providing a meter reading for energy generated by her solar panels.
• Instead of the expected amount, British Gas emailed her to confirm a payment of £38,611.59.