phew.... however I have jsut put this together.... ! So you can jolly well read it

The actual process is as follows (in Scotland) - so very similar to England
The monument could be suggested by an individual, a county officer (perhaps after an evaluation) or through one of the many heritage audits.
1. The first step in considering whether a monument is of national importance is to identify and understand its cultural significance.
2. This is followed by an assessment of the Cultural Significance, which is related to its artistic, archaeological, architectural, historic, traditional, aesthetic, scientific and social value and or potential (for the future).
3. Then these factors are brought in: what does the monument have intrinsically? (ie, inherent in the monument) how does it relate to the wider landscape? Does it form part of a ‘whole’ and how does it play its part in this. - this is termed… associative, and deal with more subjective concepts such as aesthetics… - For example… a Standing stone on a moor is more likely to get a higher score as it has an aesthetic solitary beauty rather than one on a roundabout half obscured by bad planting in the middle of a new town.
4. The primary purpose of scheduling is preservation of a site of national importance – and it is deemed to be in the national interest.
5. It has to remembered that national importance does not place one period of the past above another.. and also takes into consideration that current boundaries do not make sense in the past.. So the monument can be looked at on a local, regional or UK wide level. (The fortunate thing about being an island is that we have clearly defined borders for the UK as a whole.- unlike Europe for example, where the blurred boundaries stretch off in all directions)
6. Once all these considerations have been made… and this could take some time… then a decision is made on Scheduling. I have to say that the re-evaluation of the process in Scotland (at least) has taken some of the ‘fluffiness’ out of the equation.
The actual process is like this:
Either HS /EH/CADW review sites for inclusion or a site is highlighted by a council archaeologist or even member of the public.
It is considered for inclusion on the list and must achieve strict criteria.
The scheduling of the site can be instant in very rare cases, but normally takes a few months.
If someone found a Roman road in the Cotswolds for example it would not be as important as a roman road in Scotland (almost all Roman in Scotland is Scheduled as a matter of course due to rarity) If we had hundreds of them, then only the best would be scheduled, and the rest would be protected by the County Archaeology service. Scheduling is the highest form of protection, and so has to be justified at the highest level, so if it is scheduled, then there is a good reason for it… it is no longer done lightly.
This description from Wikipedia describes the concept of Scheduling very well;
In England the Department for Culture, Media and Sport keeps a register, or schedule, of nationally important sites which receive state protection. This process was first devolved to Scotland and Wales in the 1970s and is now operated by the Scottish Executive and the Welsh Assembly Government. The three government bodies with responsibility for archaeology and the historic environment in Britain are: English Heritage in England, Cadw in Wales, Historic Scotland in Scotland. The Northern Irish system is governed by separate legislation, and is operated by the Environment and Heritage Service in Northern Ireland.
A long list of criteria is used to decide whether an Ancient Monument should become a Scheduled Ancient Monument. Scheduling affords greater protection as it becomes illegal to in any way tamper with a designated area. The Scottish Criteria have recently been revised.
To be eligible for scheduling, a monument must be demonstrably of national significance according to a number of specific criteria. These are (in England and Wales):
· Period – meaning the length of time it remained in use, significant sites are often multi-period
· Rarity – monuments with few known comparators are more likely to be scheduled
· Documentation – information from earlier investigations at a site can inform on its significance
· Group value – where a monument forms part of a wider geographical landscape of important sites
· Survival/Condition – the degree to which the surviving remains convey the size, shape and function of the site
· Fragility/Vulnerability – threats to the site from natural agencies, tourism or development can lead to a monument being scheduled for its protection
· Representivity – how well the monument represents diverse similar types and/or whether it contains unique features
· Potential – its ability to contribute to our knowledge through further study
There is no appeal against the scheduling process and adding a monument to the register is normally a process requiring a great deal of research and consideration. The process can be accelerated for sites under threat however. The heritage bodies gather information on a site, define a boundary around it and advise the Secretary of State (or her devolved equivalent) of its eligibility for inclusion on the schedule.
Protection can be given by taking the monument into state ownership or placing under guardianship, the latter meaning that the owner retains possession with an undertaking to look after it. Field Monument Wardens monitor sites to ensure they are not being damaged. Wider areas can be protected by designating their locations as Areas of Archaeological Importance. As of 2004 only five city centres, all in England, have been designated AAIs (Canterbury, Chester, Exeter, Hereford and York). This part of the 1979 Act was never brought into effect in Scotland.
Damage to a Scheduled monument is a criminal offence and any works taking place within one require Scheduled Monument Consent from the Secretary of State or her devolved equivalent. Permission for non-essential development is rarely given and new building close to a scheduled monument which might damage its setting is also strongly discouraged.
The Scheduling system is criticised by some as being cumbersome. Until recently it had a limited definition of what constitutes a monument and ritual landscapes, flint scatters or underwater sites were difficult to Schedule, although three maritime sites have been designated as scheduled ancient monuments.