The break even point for Mic (that is, the time when taking the lower lump sum and the monthly pension exceeds taking the higher lump sum) is eight years and six months. This assumes that the monthly pension is not increased beyond £68 per month and also ignores any interest that may be earned on the £7,700 (at the moment you might be lucky to get 1.5%, so about £115 per annum) . So, in pure financial terms if Mic lives more than eight and a half years he is better off taking the lower sum and the pension. Taking the lower sum and the pension he is guaranteed to receive £5,465.
I might be inclined to agree with black cat and take the larger lump sum. Unless £68 per month is critical to his finances he might as well enjoy the £7,700.