For clarification about placements and 'relocating', Marjon were simply trying to make us aware that their placements do cover a massive area (Cornwall to Wiltshire), and if you are on placement it may not be easily commutable on a daily basis therefore you will need to take everything you need with you for the duration of the placement. You won't be required to rent out a second property or anything like that. Before placements happen you fill out a form and you can say if there is any reason you can't go too far away such as childcare etc, and you can put down if you have family in any of the placement areas that you could stay with. If not, you will need to stay in a hotel, and you may be eligible to claim the costs of it back depending on your bursary.
In the first year you do conversation partner and nursery observations in the local area and then a 2 week clinical block anywhere in the South West, so if it happened to be in Swindon, which is about a 2 and a half hour drive away, you would probably choose to travel up on the Monday morning and stay in a hotel until Friday night when you travel back for the weekend and then do the same for the second week. You could however be lucky enough to be placed at Derriford which is right across the road or in Torbay or Royal Devon & Exeter which are both only about 1 hour away
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In the second year there is a 2 day per week placement in the second semester, so again you may be placed further away but you would only need to 'relocate' for one night per week between the days of the placement.
3rd year placements are just 1 day per week.
4th year is slightly different though as it is only up until December and you do not attend uni at all during the 4th year. It is 3 days per week block placement plus distance learning. So if your placement isn't in Plymouth you may choose to travel and just stay away whilst on placement and then return for the other 2 days per week and claim costs through the bursary system if you are eligible, however because you don't need to attend uni, some people choose to rent accommodation near their placement instead of in Plymouth for that final half year. As 4th year is such a long way off, it's probably not worth worrying about just yet!!
I hope this helps!