In case anyone's interested.....
(EastEnders on Wikipedia, Production section)
EastEnders is often filmed on location, away from the studios in Borehamwood. Sometimes an entire quartet is filmed on location, which has a practical function and are the result of EastEnders making a "double bank", when an extra week's worth of episodes are recorded at the same time as the regular schedule, enabling the production of the programme to stop for a two-week break at Christmas. These episodes often air in late June or early July and again in late October or early November.[49] The first time this happened was in December 1985 when Pauline (Wendy Richard) and Arthur Fowler (Bill Treacher) travelled to the Southend-on-Sea to find their son Mark, who had run away from home.[49][56] In 1986, EastEnders filmed overseas for the first time, in Venice, and this was also the first time it was not filmed on videotape, as a union rule at the time prevented producers taking a video crew abroad and a film crew had to be used instead.[49]
If scenes during a normal week are to be filmed on location, this is done during the normal recording week.[44] Off-set locations that have been used for filming include Clacton (1989), Devon (September 1990), Hertfordshire (used for scenes set in Gretna Green in July 1991), Portsmouth (November 1991),[49] Milan (1997), Ireland (1997),[57] Amsterdam (December 1999),[58] Brighton (2001) and Portugal (2003).[59] In 2003, filming took place at Loch Fyne Hotel and Leisure Club in Inveraray, The Arkinglass Estate in Cairndow and Grims Dyke Hotel, Harrow Weald, North London, for a week of episodes set in Scotland.[59] 9 April 2007 episode featured scenes filmed at St Giles Church and The Blacksmiths Arms public house in Wormshill, the Ringlestone Inn, two miles away and Court Lodge Farm in Stansted, Kent.[60] Other locations have included the court house, a disused office block, Evershed House,[61][62] and St Peter's Church,[63] all in St Albans, an abandoned mental facility in Worthing,[64] Carnaby Street in London,[65] and a wedding dress shop in Muswell Hill, North London.[66] A week of episodes in 2011 saw filming take place on a beach in Thorpe Bay[67][68] and a pier in Southend-on-Sea—during which a stuntman was injured when a gust of wind threw him off balance and he fell onto rocks—[69][70][71] with other scenes filmed on the Essex coast.[72] In 2012, filming took place in Keynsham, Somerset.[73] In January 2013, on-location filming at Grahame Park in Colindale, North London, was interrupted by at least seven youths who threw a firework at the set and threatened to cut members of the crew.[74] In October 2013, scenes were filmed on a road near London Southend Airport in Essex.[75]
The two-handers (when only two actors appear in an episode) were originally done for speed; while a two-hander is being filmed, the rest of the cast can be making another episode.[citation needed]