The eight Class NUMBER@1 units are , as of August NUMBER@2 , the latest to be classified under the TOPS `` 4XX '' series for DC 3rd Rail EMUs on the LOCATION@1 .

The eight Class NUMBER@1 units are -LRB- up to NUMBER@2 -RRB- the last to be classified under the TOPS `` 4XX '' series for DC 3rd Rail EMUs on the LOCATION@1 .
