Experts trying to demolish a building described as the ugliest in Britain are to use explosives to tackle stairwells which have proved difficult to remove.
Explosives will be used to demolish the Tricorn Centre's stairwells
Giant machines being used to tear down thousands of tonnes of concrete from the Tricorn Centre in Portsmouth have had little effect on its stairs.
The centre won design awards, but its shops closed after less than 15 years and it has been derelict since 2002.
Demolition of the 1960s site is due to be completed by the end of the year.
A new shopping centre is to be built in its place.
In March this year, Owen Luder CBE - the architect who designed the building - defended its design and warned
Portsmouth would regret tearing it down.