How about a word with JHSU or MAOTs.
If you can get your missus under a Wokka, hooking (
), she'll appreciate the ride even more (
again!). Not an experience she'll ever forget! And, I'd think it a lot easier to get a cabbie if you've got JHSU or MAOTs asking for you.
I think your hardest task will be to avoid the "anyone who puts £500 in the RAFBF/SSAFA/whatever pot can have a go in a Wokka at £20k/hr".
It just might be that JHSU or MAOTs can sort this for you, if you promise to contribute to their kids Christmas bash/chosen charity.
Another thought - if money is no object, the US Army has rather a lot of Wokkas too.