There was sufficient evidence to indicate that significant and timely improvement was not happening under TI and further escalation was considered necessary and appropriate in these circumstances.
Roedd hyn ar yr amod bod lefel yr ailasesu yn gyson ar sail ymarferol ac ar sail theori ac os nad ydy hynny’n wir efallai fod achos dros ystyried ailasesiad am gyfnod byrrach.