My paralegal helped me to locate the following paragraphs which correspond to my understanding of UK marital property rules, though it is said that UK (not including Scotland) doesn’t have similar set of rules like civil law countries in terms of matrimonial property regime.
" In England, Wales and Northern Ireland there is no legal property regime between the spouses. Therefore, a marriage has no effect on the patrimonial relations between the spouses. Therefore, the rules of common law must be applied. The common law system provides that property acquired by one member of a married couple is owned completely and solely by that person. Of course, if the title or deed to a piece of property is put in the names of both spouses, however, then that property would belong to both spouses. If both spouses’ names are on the title, each owns a one-half interest."
This will solve my question. According to this, the property registered in the deceased’s name is his estate in its entirety.