This might be of use to members. I needed a chart plotter for my rib and decided to go down the tablet route. I found London Chart plotters on google but there were adverse reports. These are not fair I got a 9.7 tablet ,military case , charts and AIS system and mount for about 20% of the cost of a plotters. you deal with Steve for everything, it arrives ready to go out of the box and it is amazing., I cannot recommend more highly , I have no association with London Chart Plotters. Steve provides an" in person "helpline form 12 noon to often 4am ( it appears he does not sleep well). He has carefully chosen the tablet for its metal back, its brightness in sunlight and built in GPS so no sim card or phone signal is required at any time. no chart fees and the AIS connects with its own local wifi to the tablet so no messy wires.
Hope this might be of help to some of you.