On 11 Feb, 00:05, jonmorris wrote:

On balance, it should still be quicker than the 21-26 minutes to
King's Cross, the walk to St Pancras, waiting and the train back up
(another 20 minutes if you get a fast train).

To add; if time is more important than cost, get a taxi. In the day,
the rate is /fairly/ reasonable. Certainly no more than about £10 I'd
say, and the rank is usually full up throughout the day and into the
evening.

Jonathan