#' \code{list1mGridSpyFiles}. Lists all available 1 minute grid spy files from data repository. The functions, like most others in this package will fail
#' if you do not have the data in a folder/directory corresponding to 'path'. Code borrows extensively from similar SAVE project function.
#' This could take quite a long time if you have a lot of files.
#' @param fpath the name of the directory where the function should look
#' @param pattern a pattern to match. Use the pattern to filter e.g. 1m (xx_at1.csv) from 30s () files
#'
#' @author Ben Anderson, \email{b.anderson@@soton.ac.uk}