The East Horsley estate was later sold to William King-Noel, 1st Earl of Lovelace who undertook two major expansions of the house to his own designs.

Lovelace lived at the Towers with his wife, Ada, daughter of Lord Byron, a pioneering mathematician, friend of Charles Babbage and described as among the first computer programmers.

Now a hotel, wedding and conference venue set in parkland with a total area of about 50 acres, Horsley Towers is a Grade II* listed building.

A roof truss in the great hall he designed at Horsley carries an inscription recording that Lovelace had moulded the beam with the use of steam.

[4] Ada gained even greater prominence for her scientific endeavours; through her friendship with Charles Babbage she wrote a commentary on his analytical engine, arguably the earliest mechanical computer.

[20] The writer John Julius Norwich considered the whole "a grotesque Victorian Disneyland which has to be seen to be believed - and may not be even then", concluding that, unusually, his inclusion of Horsley Towers in his study The Architecture of Southern England, should serve as a warning rather than an inducement.