The shop, which opened in November, is one of only three outlets in Scotland and sales were 39% ahead of forecast in its first month of trading.

Waitrose is the food brand of the John Lewis Partnership.

The company says more than 4,000 shoppers visit the Byres Road shop each day and more than 28,000 transactions are going through its tills each week.

Top selling items include Waitrose’s own ready meals – particularly their Indian meals for two.

Branch manager Andy Loveday said West End customers have given Waitrose a warm welcome to Glasgow.

He said: “We’ve been bowled over by the response.

“We’ve had great feedback from customers – in short, they really like what they’ve found.”

The John Lewis Partnership is the UK’s largest employee-owned business. The business backs local and regional suppliers, and the Byres Road store sells products by several local producers such as West, a Glasgow Green-based micro brewery, the Handmade Meringue Company and Gigha Island Halibut.

Customers have also had a chance to select the first three beneficiaries of the Waitrose Community Matters scheme, which donates £1,000 each month to local charities and projects.

Maggie’s Cancer Centres, Community Transport and the North West Women’s Centre will all receive a share of the cash from November and the charities chosen for December are the Notre Dame Centre, Marie Curie Cancer Care and the Glasgow Simon Community. Customers cast their vote for their chosen charity using a token they get with each till transaction.

The chain’s online grocery shopping and delivery service, Waitrose Deliver, is now also available to shoppers living in a wide range of Glasgow postcodes.

The Glasgow store represents an expansion by Waitrose in Scotland, part of an ambitious UK-wide growth strategy.

Subject to planning permission, the company plans to build a new 25,000 sq foot store at Newton Mearns, due to open by 2011.