OK amiddl, here's the cheapest option I've found using split tickets. These prices are correct as at 2110 30/07. 16-25 Railcard prices in brackets. All are advance purchase singles and I have given ample time to cross London - time to grab lunch on the outbound and dinner on the return. (Or time to absorb delays!)
The Kings Cross - Leuchars prices include an online discount and are only available from
East Coast's website. I suggest buying all the tickets from there in one transaction.
OUT 12th Octoberd0855 Plymouth - a1223 Paddington* ^16.00 (^10.55)
d1400 Kings Cross - a1938 Leuchars ^24.90 (^16.45)
RTN 14th Octoberd1120 Leuchars - a1657 Kings Cross ^18.70 (^12.35)
d1945 Paddington* - a2317 Plymouth ^16.00 (^10.55)
TOTAL: ^75.60 (^49.90)*When purchasing specify
Zone U1 London in the origin/destination box to include a cross London transfer by tube. The prices quoted include the transfer.
As you can see there is plenty of time to make the cross London journeys, in fact maybe too much on the return journey but thats the cheapest option. If you'd prefer to get back to Plymouth earlier then I can look at alternatives, just PM me.
The
Bargain Berths on the Caledonian Sleeper are currently ^29.00ea on the 12th from Euston - Leuchars and ^39.00ea on the return on the 13th. As this includes your accomodation then it will be a cheaper option than stopping overnight on the 13th in Leuchars. Won't be as comfy as a B&B or Hotel though, but I find a glass or three of red wine or a wee dram from the buffet helps me get to the land of nod! Be aware these Bargain Berths sell out very quicky so if you take this option then get in there quick!
Hope this helps
Mac