In full the Government says:
Pope Benedict XVI will visit the UK from 16 to 19 September at the invitation of Her Majesty The Queen. The visit is described as a Papal Visit with the status of a State Visit. The programme will include a number of pastoral events, which are the responsibility of the Catholic Church, as well as some significant official events, which will provide opportunities for issues of common interest to the UK Government and the Holy See to be discussed at the highest level.Without rehearsing the issues again, my problem with this is that the "issues on which we disagree" also involve illegal acts committed by his Church on U.K soil. He and his organisation have conspired to conceal those acts and yet we are allowing him this publicity opportunity in our country and at our expense.
The Holy See has a global reach and so is a valuable international partner for the UK Government. Our relationship with the Holy See enables us to address jointly a range of foreign policy and development issues. These include working towards delivery of the Millennium Development Goals, addressing the impacts of climate change, preventing and resolving conflict, and finding ways to encourage disarmament.
As with any bilateral diplomatic relationship, there are issues on which we disagree. The Holy See is clear on our positions on these issues. However, we believe that Pope Benedict’s visit will provide an opportunity to strengthen and build on our relationship with the Holy See in areas where we share interests and goals, and to discuss those issues on which our positions differ.
Since the visit has the status of a State Visit, and some parts of the programme are being organised by the British Government, a proportion of the costs of the Visit will fall to the Government. The costs can be divided into two categories: policing costs, which will be met by the State from existing policing budgets, and non-policing costs, which will be split between the Catholic Church and the Government. The total size of the costs at this stage is not confirmed but discussions are currently under way to decide the appropriate levels of contribution from the Government and the Catholic Bishops’ Conferences of England and Wales, and of Scotland. Other parts of the programme, such as the Masses and other pastoral events, are the responsibility of the Catholic Bishops’ Conferences. The direct costs of these events will therefore be borne by the Catholic Church.
In any event the Pope's status as a head of state is contentious and it would be very easy for the Government to pass off all of the cost of this to the Catholic Church which can comfortably afford it.