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M&S Reopens Pantheon Flagship on Oxford Street as Its R&D Store

The redesigned four‑floor store will test new layouts, services and merchandising to guide a wider multi‑million‑pound refresh of M&S’s London estate.

Overview

  • The refurbished Pantheon opened in mid‑July 2026, with the full four floors now public and the store occupying almost 100,000 square feet on Oxford Street.
  • The project follows a years‑long planning fight in which then‑housing secretary Michael Gove refused demolition permission in 2023 and a High Court judge later found the government had made a series of flawed decisions in blocking the plans.
  • M&S says the store is its first full‑line flagship and will operate as a research‑and‑development site to trial changes to fashion, home and beauty merchandising and store design before wider roll‑out.
  • New customer services and features include a made‑to‑order bespoke suiting service (prices start around £350), a larger beauty hall carrying third‑party brands, an expanded homeware area with an M&S x Kelly Hoppen edit, and digital merchandising elements such as inspirational screens and curated scents.
  • Pantheon is part of a multi‑million‑pound estate programme — including a reported £90m for London — that covers ten planned refurbishments or openings this year and earlier approvals such as the Marble Arch rebuild, and its success could change how millions of shoppers experience high‑street retail in London.