I imagine the exploration licence covers the area of the former Lord Ashburton's estates, (Baring family of Baring's Bank). According to SWCM management these mineral rights were purchased by the widow of a deceased mining engineer in the 1930's, with the hope of establishing a mine in memory of her husband.
Really regarding any future prospects at Prince of Wales, these must be minor compared with Redmoor.
To give some idea of the significance of Redmoor, the SVM zone discovered in the early 1980's was shown by intensive drilling to be similar in size & combinedSn/W grade to figures for Hemerdon at that time. However only this was just the quoted results for the investigated section, I understand the limits had not been proved either in depth or east (under Kit Hill) or west. It differs from Hemerdon in being largely sediment hosted, richer in Sn & poorer in W, and containing significant copper silver & zinc. The grades quoted for the investigated section suggest a tin content for that bit far exceeding all previous production from east Cornwall, a similar tonnage of wolfram, & copper more than twice that of the total production of DGC.
For the bulk of this to be worked could really be by open pit, which would result in the disappearance of the Kelly Bray
area. Not suprisingly, SWCM's plans were for an underground mine concentrating on the richer sections of the zone. this would still have been low grade & the largest mine in Cornwall in terms of crude ore tonnage.
Intersestingly although this mineralisation seems to have been unknwon to 19thC mines in the areas, SWCM did find remains of ancient workings along the back of this zone in trial pits they sank.