Yellow Umbrella Day is the inspiration of and organised by Chiswick Park Enjoy-Work.

Chiswick Park is a major office park in West London that, when complete, will provide a workplace for up to 15,000 people. Designed by the Richard Rogers Partnership and developed by Stanhope, Chiswick Park is a highly innovative concept that offers a working environment of uncompromising quality.

Chiswick Park is an entirely new type of workplace. Its culture and ethos is hinged on the notion of providing an environment which actively encourages employees to enjoy work. This ethos is represented by the brand, Chiswick Park Enjoy-Work, that manifests itself in the everyday lifestyle offered at Chiswick Park.

At present, there are over 4000 employees (referred to as "guests") based within the park, from a range of companies.

Chiswick Park Enjoy-Work is committed to the community, both local and global. The primary focus of community initiatives is to support the charitable interests of the Chiswick Park community (i.e. the companies on the Park). Within the above parameters, the selection of charitable organisation partners will be held to a number of criteria, specifically that they be non partisan - political / religious. Preference will be given to organisations with mandates for the development of self supporting services. This includes the provision of tools, resources and training that will provide long-term benefits to those in need. Elected organisations need to deliver direct and measurable impact to demonstrate that they support community principles and participation.