Red Mercury is shown with a status on IMDB as 'Post-Production'
(updated 21 Feb 2005). Amanda is playing Electra (the waitress).

The possibly over-detailed plot description on IMDB is as follows:

"Three young Muslim men, part of a terror cell, are making a bomb in
a London flat, when they get a call to vacate immediately with their
gear. The police have been alerted and they are under suspicion.
Asif, Shahid and Mushtaq grab suitcases, the computer, and a
cardboard box containing bomb making equipment and bolt out the
door. Shahid's getaway car is clamped so the three are forced to
escape on foot from the pursuing police. Cornered, they dive into a
restaurant on a busy city street. It is the Olympus Grill and dinner
is being served to its well-heeled clientele. With the police
outside, Asif, Shahid and Mushtaq have nowhere to go. Mushtaq,
thinking quickly, declares that they will hold the restaurant goers
hostage. The diners are forced to get up from their tables where
they have been enjoying the delicious Greek cuisine. They are lined
up against a wall. Electra, the young waitress, is also forced to
stand in line. Her mother, who is the restaurant owner, comes out
from the kitchen brandishing a rolling pin to find out what is going
on. She is Penelope and a rather formidable woman. Penelope at first
thinks the three boys want to steal money until they reveal their
true intentions. Outside a sophisticated police/MI5 operation is
underway to release the hostages. Leading the operation is Sofia
Warburton, a 45 year old woman with a strong character, who has
sacrificed domestic harmony for her career in the security services.
Sofia begins to assemble data gleaned by the police and information
from voice samples and fingerprints to create a profile of the
hostage takers. She discovers that Shahid, from a single-parent
family, grew up in a rough working class Birmingham council estate,
and was a bad boy until he found religion. Asif got a double first
in Natural Sciences at Cambridge. He was brought up by his widower
father who was prone to beating his kids. Asif works at his father's
wine warehouse and was a good taster until he took up Islam and.
Mushtaq is the natural leader of the three and has a PhD in physics.
The big fear is learning that the terrorists are in possession of
red mercury which can be used to make a dirty bomb with the
potential of unleashing untold damage and horror. The three youths
have the knowledge and skills to make the bomb. Sofia checks the
physics with her estranged husband Lindsey who confirms that it is
possible. Time is of the essence. Meanwhile, inside the restaurant
tension mounts as the hostages remain under threat of death from the
three gun wielding terrorists. The hostages are: Sidney, a middle-
aged American management consultant, Amanda, a 34 year old
physiotherapist, Neil Ashton, a children's author and his wife
Gerry, his daughter Jemma who is a nurse and his adopted mixed-race
son Timothy; John, 45, head of a large chemical company and his
mistress Janet. And strangely, as days go by and nerves are frayed,
the barriers between the hostages and their captors begin to come
down. Behind the blank face of terror is scared, confused, and
misled youth."

It isn't clear to me from IMDB whether this is a made for TV movie
or not (although I have my suspicions).

As usual, if anyone has anymore information regarding this,
please "share with the group"

cheers