Looks like Tesla's website was in the process of being updated earlier (either that or my PC was caching old page information?). Now when I visit their map the new sites are in the correct location. Information for Canary Wharf has also been updated. In summary:
Berwick - now at correct location, incorrectly states 8 x 250 kW (should be 6)
Leicester - now at correct location, 8 x 250 kW, note this appears to replace the old Leicester LFE marker
London - Canary Wharf - updated to show 8 x 250 kW + 4 x 150 kW. This seems to confirm the V2 superchargers have been upgraded to full power although the website info can differ from the in-car Nav (the latter being more reliable).
Nottingham - now titled "Nottingham-Loughborough Road", 4 x 250 kW + Service Centre and Showroom. Location updated (although pin is on the wrong side of Loughborough Road)
(Mansfield & Uxbridge details were already correct)