Hi Colin,
Generally, the court would consider all contributions. Therefore, the court will most likely consider the workplace contribution of 250K and the contribution toward the house of 150K (if they were in a relationship at that time).
There are many threads on this forum that talk about financial settlements post divorce/separation. All of them are quite vague since financial settlements are very much dependant on the individual facts and a combination of factors. The general rule is that everything is able to be considered (e.g. joint accounts, individual assets, any contributions toward anything, gifts received under will or otherwise). What won't be considered are assets held on trust for third persons.
Have a look at this LawAnswers Family Law Forum thread in particular:
"Separation - how much is fair to split with ex".
If her solicitor is saying something different, she should ask her solicitor to explain to her why that is.