Guides
Guides to business texting in the UK
Practical guides on SMS rules, message length, writing texts people act on, and connecting your systems through the API.
- SMS marketing rules in the UKThe UK rules for marketing texts in plain English: PECR consent, the soft opt-in, the opt-out every text needs, and who is responsible when it goes wrong.Read more
- SMS character limitsHow many characters fit in a text: 160 in GSM-7, 70 in Unicode, 153 and 67 per part once split, the symbols that count as two, and how parts are billed.Read more
- UK sender IDsHow alphanumeric sender IDs work in the UK: the 11-character limit, the MEF SenderID Protection Registry, Ofcom's 2026 rules and why nobody can reply.Read more
- STOP repliesWhat happens when someone texts STOP, which keywords count, what UK law expects you to do next, and how to keep your contact lists clean afterwards.Read more
- How business texts reach UK phonesIn plain words: how a business text gets from your screen to a UK mobile, why replies need a real number, what an A2P route is and what delivery reports mean.Read more
- Textlocal alternativesTextlocal closed on 31 July 2026. What that means, what to check when choosing a new SMS provider, and how to move contacts and API calls to CaptiFi Connect.Read more
By email
Get the guides to UK business texting in your inbox
The rules for marketing texts, how message length and credits work, how to write texts people act on, and a quickstart for the API. One email with the links, then an occasional follow-up you can stop any time.