Lauren's grandad, Barry, used to tell bedtime stories to her and his other grandchildren - and their parents before them - about Upside Down Land, a place where, if you went into a shop and asked for a loaf of bread, they'd give you a lump of coal. And if you asked for a lump of coal, they'd give you a banana.
We went to his funeral in Cardiff yesterday and so we reminisced about this, as well as the kindness, hospitality and good humour for which he and Lauren's nana were known and so well-loved by their extended family and the friends of their four children. We heard old, familiar stories about Lauren's Grandad's time spent in Czechoslovakia and his stint in military intelligence in Malaysia during the war.
I met Barry 27 years ago when I visited Cardiff for the first time, and I have been going back regularly to Wales ever since. It wasn't until yesterday that I realised the possible inspiration for Upside Down Land: Cardiff Central Station.
Checking the monitor in the ticket hall for a platform number for the train back to London Paddington at 7.25 pm, I saw Platform 3: London Paddington 7.26pm. Lauren and I went to Platform 3 and waited, and it wasn't until we were about to board the train that we realised it was coming from London, not going there.
It seems that last night the monitors in the station ticket hall and on the platforms at Cardiff Central Station were displaying arrival times and originating stations rather than destinations and departure times. So if you wanted to go to Swansea, you had to look for London Paddington to work out where to wait for your train. And if you wanted to go to London Paddington, you had to look for Swansea.
I have taken the train from Cardiff to London many times before and never noticed this peculiarity. This, and an anomalous event that both Lauren and I witnessed later that night, leads me to concede that it might not have been Welsh bloody-mindedness to blame, but something much more mysterious. Let me explain:
Having just missed the direct train to London at 7.25, Lauren and I hopped aboard the 7.30 to London via Bristol Temple Meads and Bath Spa, a slightly more meandering route that would involve a change of trains.
As we peered out of the window of the train at Bristol Temple Meads, wondering whether to change here (as directed by two members of staff* at Cardiff Central) or at Bath Spa (as directed by the guard on the train), Lauren and I saw a white man of about my age get off the train and walk past our window towards the station exit.
As we left the train at Bath Spa eleven minutes later, we saw
the same man leave the train from the same door and walk along the platform. To my astonishment, I realised I had encountered a fellow time-traveller.
I have no idea whether he, like me, is a pioneer in this field, or whether he was a victim, caught up in an attempt
by agents unknown to rebalance the time/distance mechanism that was put out of kilter by my experiment the week before, when
I successfully travelled 19 hours into the future (and, according to Google Maps Distance Calculator) a distance of 7.439 miles to Hampstead from my home Brixton.
The man on the platforms at Bristol Temple Meads/Bath Spa railway stations had slightly wild hair but the look on his face was innocuous enough. He had neither the thrilled expression of a man on the ride of his life, nor the terrified bewilderment of someone who has been hurled forward in time to an unexpected destination. Perhaps he habitually time travels, and this jaunt was no more than a routine commute. Perhaps he was cunning. Perhaps he was stupid. Perhaps he'd had botox.
One thing I know: he travelled a greater distance on Monday 10th (11.195 miles) than I travelled on Sunday 2nd, but he only went forward eleven minutes into the future.
Another thing I know: I left Cardiff at 7.30 pm instead of 7.25 pm - and arrived in London at 10.14pm instead of 9.32 pm. That's 37 minutes unaccounted for.
Here's what I don't know:
*Was the train journey used to debit some of the time owed from my Brixton to Hampstead jaunt on 2nd Jan?
* If so, by whom?
* How did they persuade the staff at Cardiff Central Station to change the display on their monitors to trick me into missing me train?
If time was being recalibrated last night, it means I still owe more than 18 hours.
The re-routing of my journey may also have been an attempt
by someone to debit me some distance by forcing me to cover a greater number of miles when travelling between the same two points (Cardiff and London). I have no idea whether I still owe anything or whether I might even be in credit.
I consulted that marvellous oracle, Google, with the words 'train journeys distance uk'. The answer was something of a break-through: a very strong hint that train travel is a
time travel portal:

I asked again: 'Who uses train travel to debit time and distance?' Once again, Google indicated that the answer lay within the offices of National Rail Enquiries, with a hint that I should investigate the person or persons responsible for issuing season tickets.

Before I attempt to time travel again, I need to know whether any hours I gain will subsequently be debited from me on a weekly basis. I will call National Rail Enquiries to try to discover the answer to this.

One final thing. When someone is said to work 'in military intelligence' we now know that this is a euphemism. In a James Bond novel, they might be called a spy. Did Lauren's grandad, with his David Niven moustache and his top secret 'military intelligence' work during the war, stumble on information about the way that train travel relates to time travel? Did his research lead him to Cardiff? Did he later try to explain the significance of Cardiff Central Station to his children and grandchildren with coded stories of 'Upside Down Land'?
I'm afraid it's too late to ask him now. Lauren and I visited Malaysia about twenty years ago, so I'm going to look through our old photos and see if they hold any clues. Not long after we went to Malaysia, we went to Australia, and someone from our future in London travelled back in time to Bondi Beach to visit us on Christmas Day (I have the photo to prove it). That may be relevant. It's a long story so I'll tell it another time.
*or were they?