London Underground's proposed new groups for the Jubilee line are as follows:

Wembley Park - Stanmore, Canons Park, Queensbury, Kingsbury, Wembley Park, Neasden - 6 stations, c.95 staff

• This is the current Wembley Park group, with no changes to the stations included. Currently, Wembley Park group has 110 staff. So, management's proposals represent the loss of around 15 jobs on these stations.

Willesden Green - Dollis Hill, Finchley Road, Kilburn, St John's Wood, Swiss Cottage, West Hampstead, Willesden Green - 7 stations, c.115 staff

• This is the current Willesden Green group, with no changes to the stations included. Currently, Willesden Green group has 132 staff. So, management's proposals represent the loss of around 17 jobs on these stations.

Waterloo - Westminster, Waterloo, Southwark - 3 stations, c.155 staff

• This is the current Waterloo group, with Southwark added. Currently, Waterloo Group has 161 staff; Southwark has 27, and its share of its current group's reserve is around 10. Total = 198. So, management's proposals represent the loss of around 43 jobs on these stations.

London Bridge - London Bridge, Bermondsey, Canada Water, Canary Wharf - 4 statons, c.175 staff

• This is the current London Bridge group, with Southwark removed and Canada Water and Canary Wharf added. Currently, London Bridge group has 149 staff (of which 27 are at Southwark, with its share of its current group's reserve around 10). Canada Water has 24 staff, Canary Wharf 47, and their share of their current group's reserve is around 28. Total = 211. So, management's proposals represent the loss of around 36 jobs on these stations.

Stratford - North Greenwich, Canning Town, West Ham, Stratford - 4 stations, c.135 staff

• This is the current Stratford group with North Greenwich added. Currently, Stratford group has 111 staff; North Greenwich has 33 staff, and its share of its current group's reserve is around 11. Total = 155. So, management's proposals represent the loss of around 20 jobs on these stations.

Jubilee line totals - 5 groups, 24 stations, c.675 staff
Current totals - 6 groups, 24 stations, 806 staff
Total loss of jobs on the Jubilee line = c.131

Current Waterloo group reserve staff would have to work at Southwark as well as at the stations that they cover at present. They will incur extra travelling time, and more unpredictability in allocation of duties.

Current London Bridge group reserve staff would probaby be redeployed to the new Waterloo group, or remain on the London Bridge group and have to work at Canada Water and Canary Wharf as well as the stations they cover at present. They may not get to choose which. They may work as far west as Westminster to as far east as Canary Wharf. They may incur extra travelling time, and more unpredictability in allocation of duties.

Current Canary Wharf group reserve staff would probably be redeployed to either the London Bridge or the Stratford group, and may not get to choose which. So they could end up working as far west as London Bridge, or as far east as Stratford. They may incur extra travelling time, and more unpredictability in allocation of duties.

Current Stratford group reserve staff would have to work at North Greenwich as well as at the stations that they cover at present.