"Issue of letter before action and associated costs £250 +VAT"
They're charging you for the LBA?
Respond, charging them £500
[Edit]
Have you googled the solicitors? Sounds like a shakedown outfit.
@NotThamesWater started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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"Issue of letter before action and associated costs £250 +VAT"