TOM6058 PMI/LGW 737-800 GCDZI
Engine 1 'fluctuating' (although not actually shut down) around about 2100.
A/C landed about 2125 on 08R (delaying the runway change slightly)
Looked firm touchdown from where I was stood although that was about a mile away and it was dark! (any one you can walk away from...)
Taxied under own power to stand 135 with fire escort (standard procedure for a full emergency such as this)
Edited to say that stand 135 was always planned for this A/C, nothing to do with the situation that arised later...