Please critically analyse the following:

"A trust which is not for the benefit of ascertainable beneficiaries is described as being a trust for the pursuit of an abstract purpose. Trusts for abstract purposes are void under English law precisely because there is no beneficiary who can enforce the trustees' obligations before the court". ( Hudson, Equity & Trusts 8th Edn).

With reference to case law, discuss whether this statement is an accurate and desirable situation.