Studio Weave has won a competition to design a series of temporary structures at the historic Kedleston Hall in Derbyshire.

The practice, which this week won a Civic Trust Award for the Longest Bench in Littlehampton, has been briefed by the National Trust to design three installations to draw people from the hall into the parkland.

They will stand in the grounds of the Robert Adam-designed structure from August to November this year.

Meanwhile, National Trust director-general Fiona Reynolds has stepped down after more than 11 years in the job.

Reynolds, who is moving to become master of Emmanuel College at the University of Cambridge said she would “miss it terribly”.

“I have loved every minute leading the National Trust and working with our passionate and dedicated staff, volunteers and supporters,” she said. “I am incredibly proud of all that we have achieved in the last 11 years.  

“There is no organisation like it and I will miss it terribly.  But it is time to allow someone else an opportunity to make their mark.”

Reynolds, 53, will continue at the National Trust until her successor is in place. She plans to use the interval between leaving and moving to Cambridge in September 2013 to write a book about her years at the trust.

Simon Jenkins, National Trust chairman, added: “She guided us with panache, first to financial solvency and then to 4 million members. We shall miss her, and wish her every success in the future.”