At Lowther, Lannin oversaw the first phase of restoration works, including reinstatement of original paths, removal of 4,000 tons of demolition soil and rebuilding of the main lawns.
Lannin returned to Sudeley in February to help them with its hedging works and "never left". He said it "felt like coming home".
At Sudeley, he is continuing with ongoing projects, including the replanting of the rose garden to reflect the heritage of the modern rose, with both form and scent in mind. Future plans include the restoration of the castle's secret garden.
Visitor numbers at the castle have risen 15 per cent year-on-year from March 2013 to July 2013.