A temporary piece of artwork painted onto Mt Snowdon in celebration of the area's sheep-farming community has been turned into 'graffiti' after it failed to 'wash away' in the rain. The 100ft mural - which consisted of a poem written by Wales' national poet - was painted onto a cliff face near Gladstone Rock as part of The Gathering, an outdoor performance staged by the National Theatre of Wales. The four-hour performance used the national park's landscape to tell the story of ancient farming techniques and involved herding the audience around the mountain. The poem, one of the main features of the production, was meant to 'wash off' in the rain once the performances were over - a crucial caveat when the artwork was granted permission.
@highlight
National Theatre of Wales hosted four-hour show called The Gathering
@highlight
Part of setting was the mural of the poem written by Wales' national poet
@highlight
National Trust gave permission for mural because it would 'wash off' in rain
@highlight
But a hotter-than-average summer has imprinted painting onto the rock
@highlight
Snowdonia Society says the 'graffiti' has left a 'bad taste' in the area
@highlight
NTW has apologised and said it is trying to remove the rest of the mural
'Following consultation with the @placeholder, the words in this installation were written in a natural, clay-based paint, which is non-harmful.