Lumpy mail is any direct mail piece with a physical object inside — in our case, a branded pen. The "lump" in the envelope triggers curiosity and almost guarantees the letter gets opened, rather than going straight in the bin. Warm direct mail averages a 7.2% response rate and £9 back for every £1 spent (JICMAIL Response Rate Tracker, 2025), versus around 0.9% for plain cold direct mail (JICMAIL, 2025).
We use over 30 public data sources including Companies House (5.15 million businesses), ONS Census data, IMD deprivation indices, planning applications, food hygiene ratings, and more. This lets us target by area, business type, sector, property type, and dozens of other factors — a depth of targeting very few UK direct mail providers offer.
Everything. A personalised letter printed on premium paper, a branded pen (your logo or ours), a C5 windowed envelope, Royal Mail postage, and QR code tracking on every piece. There are no hidden extras.
Our campaigns start at 500 pens. 500 is the smallest campaign we run — big enough for the targeting and the tracking to be worth doing. From £1,595 all-in for 500 pens, delivered.
Your pens are printed, packed and posted within 10 working days of your approved pen design and final payment. Most campaigns land within 2–3 weeks of ordering. Royal Mail 2nd class then delivers within 2–3 working days.
Yes. Request a free sample pack and we'll send you an actual lumpy mail letter with pen, so you can see exactly what your customers will receive. Contact us at hello@lumpymailpens.co.uk.
Yes. We use publicly available data from government sources. We don't buy or sell personal data. We post to business addresses under the legitimate-interests basis in UK GDPR. We've written down the assessment behind that, every letter carries an opt-out, and we stop straight away if asked. PECR covers email, texts and calls — not post. We're registered with the ICO.
Any business that serves a local area. Our most popular sectors are estate agents, accountants, solicitors, dental practices, restaurants, builders, IT support companies, cleaning companies, gyms, and charities. We have industry-specific templates for each.