Euroffice, the office supply company, are offering new business customers, a free £20 M&S voucher, or 15% off, with their first order, over £149 (exc vat).
It's for businesses only, but you can register as a business easily, so in 'theory' anyone could register a 'business' with the company!
£149, exc vat, is the threshold for the freebie, which is pretty easy to get to if ordering office supplies, especially ink toners!
When you place a 2nd order, you then get offered a free £10 e-voucher for a range of establishments, such as Uber Eats, Amazon etc...
The M&S voucher takes 2 weeks to come to you, which is to stop you returning the goods, within their 14 day money back returns policy, but for anyone needing office supplies, this is well worth a try, it's free delivery too!